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Chapter Contents

Chapter Glossary

(COTS)Commercial-off-the-Shelf
(EELV)Evolved Expendable Launch Vehicle
(ESPA)EELV Secondary Payload Adapter
(GEO)Geostationary Equatorial Orbit
(I&T)Integration and Test
(kg)Kilogram
(LEO)Low Earth Orbit
(MEO)Medium Earth Orbit
(MTBF)Mean Time Between Failures
(NASA)National Aeronautics and Space Administration
(SHF)Super High Frequency
(SmallSat)Small Satellite
(SPA)Secondary Payload Adapter
(STMD)Space Technology Mission Directorate
(TRL)Technology Readiness Level
(UHF)Ultra High Frequency
(UK)United Kingdom
(Unk)Unknown
(USA)United States of America
(VLEO)Very Low Earth Orbit
(VHF)Very High Frequency
(W)Watts
(xGEO)Beyond Geostationary Equatorial Orbit

2.1 Introduction

The Small Spacecraft market allows a wide range of market utilization for mission implementations, from ground-up developments of a spacecraft to entire hosted orbital solutions. This chapter addresses the state of the art for complete spacecraft platforms in two distinct SmallSat market options.

  1. Hosted orbital services: an emerging business model in the space industry that offers customers access to satellite capabilities to host their payloads (also known as hosted orbital payloads) without the need to build, launch, or operate their own spacecraft. With hosted orbital missions, a payload is typically delivered to the provider to be integrated onto an existing spacecraft.
  2. Spacecraft bus: also known as a satellite bus or spacecraft platform, is the section of the flight segment that provides essential services to the payload and enables the mission objectives such as thermal management, power, communication, guidance, navigation and control, data processing, and propulsion. This option allows the user to purchase a spacecraft bus with optional system-level integration and test (I&T) services, but vendors may not offer hosted orbital services (spacecraft bus + system-level I&T + operations).

One option is not superior and selection may depend on the needs and constraints of each individual mission. The list of organizations/companies in this chapter is not all-encompassing and does not constitute an endorsement from NASA. The information is for awareness and guidance only. The performance advertised may differ from actual performance since the information has not been independently verified by NASA subject matter experts and relies on information provided directly from the manufacturers or available public information. Table 2-9 includes a list of providers with contact information and the source used to complete the tables. It is recommended to contact the organizations/companies directly for further clarification and applications for your specific mission needs.

This chapter organizes the state-of-the-art small spacecraft platforms into these two main categories. The dedicated small spacecraft bus section is further divided by PocketQube, CubeSat, and ESPA-Class offerings. Each subsection contains a summary table with a non-exhaustive list of commercially available small spacecraft platforms.

  • 2.2.1 Hosted Orbital Services
  • 2.2.2. Spacecraft Bus
    •  PocketQubes
    • CubeSats
    • ESPA-Class                     

Section 2.3 provides a brief explanation on systems engineering considerations that introduces newcomers to the design selection process and highlights specific resources for mission development.

2.2 State-of-the-Art – Spacecraft Platforms

2.2.1 Hosted Orbital Services

Hosted orbital service providers accept your science instruments and/or technology payloads and performs system-level integration and test, and operations. The actual implementation on the vendor side varies widely across the industry, depending on providers’ vehicle type and business model. Examples of vendor implementations may include the following.

  • Host your payload on its own dedicated spacecraft where the entirety of the spacecraft bus is at the disposal of a single customer and/or mission
  • Host your payload on vendor’s unused capability aboard their own, internally developed mission
  • Host your payload along with other payloads from different customers on a single spacecraft
  • Host your ‘software-only’ payload, also known as a ‘virtual’ payload on an existing spacecraft that supports virtual payloads

It should be noted that not all hosted orbital service providers sell their spacecraft bus to customers. For spacecraft bus providers, see Section 2.2.2. It is incumbent upon the user to conduct their own research and determine which solution best meets their mission requirements and constraints.

Common benefits of hosted orbital solutions include cost effectiveness, reliability, flexibility, faster access to space, and the ability for users to focus on the spacecraft payload. Customers can access space capabilities without the high upfront costs of building and launching their own spacecraft and can concentrate their efforts and resources on their specific instruments or technologies, leaving the spacecraft bus build, system-level integration and test, and operations to an experienced developer. Hosting of multiple payloads offers efficiencies through resource sharing, which can make this option more affordable than manifesting a payload on its own dedicated spacecraft. Common interfaces allow for rapid integration and test, decreasing the overall time to flight. Mission success can be improved by leveraging commercial provider’s proven infrastructure, processes and expertise. Services can be scaled up or down based on mission needs, allowing for adjustments in bandwidth, coverage, or mission duration. Additional space-based hosting of small spacecraft payloads is also available on several vehicles that are not covered in this report, including payloads that are hosted in or on the ISS, attached to rocket bodies, or hosted in or on capsules (crewed or uncrewed) that return to earth.

Procurement of hosted orbital services is relatively new and could be challenging if the user does not have experience procuring such services. In 2023, NASA’s Flight Opportunities program released a solicitation for Suborbital/Hosted Orbital Flight and Payload Integration Services that, for the first time, included commercial orbital platforms capable of hosting payloads. Fifteen companies were selected to provide flight and payload integration services for technology payloads to be demonstrated in high-altitude, reduced gravity, and other relevant testing environments on suborbital rocket-powered vehicles, high-altitude balloons, and hosted orbital platforms via Indefinite Delivery/Indefinite Quantity (IDIQ)contracts. These IDIQ contracts can be used by NASA centers and other government agencies to procure hosted orbital services. The Flight Opportunities competitions and solicitations (e.g., TechLeap, TechFlights) offer options for hosted orbital platforms, aiming to advance the maturity of a technology via flight tests. Additional information on NASA’s Flight Opportunities program and the IDIQ contract for hosted orbital services can be found here: https://www.nasa.gov/stmd-flight-opportunities/nasa-contracted-flight-providers/.

Table 2-1: Hosted Orbital Service Providers
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the Hosted Payloads category)
Organization HeadquartersMax VolumeMax Mass (kg)Peak Power (W)3-σ Pointing Control/ KnowledgeDestinationUS Office
Aerospacelab Belgium0.125 m350300<0.005°/ <0.005°LEO, GEOYes
Artemis Space Technologies UK0.58 m35001,5000.01°/0.01°LEO, MEO, GEO, Lunar and Deep SpaceNo
Astranis Space Technologies Corp. USA0.02 m310300<0.1°/ <0.09°GEOYes
Astro Digital USAUnkUnkUnkUnkUnkYes
Axelspace Japan0.2 m330184<0.05°/ <0.04°LEONo
Berlin Space Technologies Germany1 m32502,500<0.017°/< 0.017°LEOYes
C3S Electronics Development Hungary16.5U18.51550.2°/ 0.2°LEO, MEONo
CREOTECH Poland>50U100175<0.015°/< 0.015°LEO, MEO, GEO, LunarNo
EnduroSat Bulgaria150U703000.1°/ 0.008°LEOYes
General Atomics EMS USA0.46 m32004500.03°/ 0.02°LEOYes
German Orbital Systems Germany4U850<1°/< 1°LEONo
Gran Systems Taiwan6U12502°/ 2°LEO, LunarYes
Harpy Aerospace India6U2872<0.1°/< 0.01°LEO, GEO, Lunar, ISSYes
Hemeria France0.1 m335250<0.03°/<0.01°LEO, GTO, GEONo
Innova Space Argentina0.5U0.54<15°/< 15°LEOYes
Loft Orbital USA0.44 m385>1,000<0.035°/<0.03°LEOYes
Momentus Space USA1 m38003,0000.008°/ 0.008°LEO, MEO, GEO, Lunar, Deep SpaceYes
NanoAvionics Lithuania0.7 m31503780.15°/ 0.03°LEOYes
Nara Space South Korea16U191200.05°/ 0.03°LEONo
NearSpace Launch USA8U161600.5°/ 0.2°LEOYes
Northrop Grumman USA0.37 m350420<4°/<1°LEOYes
NovaWurks USA1 m330020000.002°/0.0004°LEO, GEO, xGEOYes
NPC SPACEMIND Italy12U24100<0.1°/<0.1°LEO, MEONo
OHB LuxSpace Luxembourg0.3 m390600<0.022°/ 0.01°LEONo
OHB Sweden Sweden1 m33001,5000.008°/ 0.008°LEO, MEONo
Open Cosmos UK12U181600.03°/0.02°LEONo
Orbital Astronautics UK0.163 m31005,000<0.05°/<0.01°LEO, MEO, GEO, Deep SpaceNo
Orion Space Solutions USA14U45 400<1°/<1°LEO, GEO, Lunar Yes
Quantum Space USA0.5 m31004000.006°/0.006°LEO, GEO, Cislunar, Lunar, Deep SpaceYes
Redwire Space USA0.94 m31045000.005°/0.0017°LEO, MEO, GEO and Deep SpaceYes
Rocket Lab USAUnkUnkUnkUnkLEOYes
SatRev Poland3U3251°/0.6°LEONo
Sierra Space USA0.48 m32505000.001°/ <0.001°LEO, MEO, GEOYes
SITAEL Italy0.90 m31202,0000.0017°/ 0.001°LEONo
SpaceX USAUnkUnkUnkUnkLEOYes
Space Inventor Denmark24U50400<0.008°/ <0.008°LEO, GEO, MEONo
Spacemanic Czech Republic12U185000.1°/ 0.05°LEO, MEO, GEO, LunarNo
Spire Global USA12U323000.1°/ 0.05°LEOYes
Surrey Satellite Technology Ltd. UK0.4m32002,000<0.01°/ <0.01°LEO, MEO, GEO, LunarNo
Terran Orbital USA12U1005000.014°/ 0.002°LEO, GEO, Deep SpaceYes
Varda Space Industries USAUnkUnkUnkUnkUnkYes
Xplore USA0.125 m3552100.17°/ 0.018°VLEO, LEO, CislunarYes
York Space Systems USA3001,5000.008°/ 0.004°LEO, GEO, LunarYes

2.2.2  Dedicated Spacecraft Bus

The SmallSat market offers complete spacecraft bus solutions including system-level I&T and operations options. Spacecraft bus providers in this section may only offer the spacecraft bus as a product or may also provide I&T and operations services. Contact the provider using the Table 2-9 to better understand the services offered if a provider seem to meet your basic requirements advertised in the tables.

PocketQubes

PocketQubes refer to small satellites that conform to a form factor of 5 cm cubes. PocketQubes use a standard deployer and follow a unit nomenclature of P. In this case 1P refers to a single 5 cm cube (see Figure 2.3). Consequently, 2P refers to two of these single units. A typical PocketQube deployer can deploy up to a 3P satellite but larger deployers may allow additional capability. PocketQube providers have developed spacecraft buses to simplify mission implementation; a list of providers is included in this section. Table 2-2 provides available commercial PocketQube products. Figure 2.4 is an example of a PocketQube deployer at Alba Orbital.

diagram
Figure 2.3: PocketQube Dimensions.
cubesats
Figure 2.4: Alba Orbital Integration of PocketQubes into the Deployers.
Credit: Alba Orbital.
Table 2-2: PocketQubes Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the PocketQube category)
Organization  HeadquartersPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
Alba Orbital UK155°/2°UHF, SLEOFlown LEOYes
DIYSATELLITE Argentina9<5°/<5°VHF, UHF, SHFLEO, GEO, LunarFlown LEONo
FOSSA Systems Spain10<5°/<5°UHF, SLEOFlown LEONo
Hydra Space Systems Spain85°/5°VHF, UHFLEOFlown LEONo
Innova Space Argentina3.9N/A -Magnetic PassiveUHFLEOFlown LEOYes
Quub, Inc. USA265°/2°UHF, SLEO, LunarFlown LEOYes

CubeSats

CubeSats refer to small satellites that conform to a form factor of 10 cm cubes. The CubeSat standard was created by California Polytechnic State University, San Luis Obispo, and Stanford University’s Space Systems Development Lab in 1999 to facilitate access to space for university students. Low-cost access to space increased due to the adoption of the standard by launch providers. Many organizations are currently using the standard including academia, private industry, and government. More information on the history of CubeSats can be found in the introduction of this report. CubeSat providers have developed spacecraft buses to accommodate missions from <1U to 27U satellites. This section provides a list of providers separated by satellite size: 0.25U-3U (Table 2-3), 6U (Table 2-4), 12U (Table 2-5) and 16U+ (Table 2-6).

Multiple companies have developed deployers for CubeSats with different dimensions and external volume allocations. Contact your sponsoring organization and/or launch provider for specifics on which deployer to use in your mission. The primary two interfaces follow the classic corner rails or the tabs (clamped and unclamped). Most spacecraft bus providers in this chapter can adapt to different interfaces. Refer to the Launch, Integration, and Deployment chapter for further information on SmallSat deployers. Figure 2.5 includes images of CubeSat missions that have been successfully flown in space, Figure 2.6 provides examples of CubeSat deployers’ locations on a rocket, and Figure 2.7 provides examples for 6U and 16U satellites from Spire Global.

cubesats
Figure 2.5: Examples of flown CubeSats. (Top left) 1U PhoneSat spacecraft, (top right) 12U CAPSTONE spacecraft, (lower left) 3U CLICK spacecraft, (lower right) 6U PTD-3 spacecraft.
Credits: NASA and Terrain Orbital.

cubesat deployers
Figure 2.6: (left) Location of Artemis CubeSat deployers in between the Orion Crew Vehicle and the Interim Cryogenic Propulsion Stage (ICPS); (right) NASA Nodes mission deployment from  ISS.
Credit: NASA.
Figure 2.7: Examples of a 6U and 16U CubeSat.
Credit: Spire Global.
Table 2-3: 0.25U-3U Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the 0.25U-3U category)
Organization HeadquartersPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
AAC Clyde Space Sweden90<0.1°/<0.01°VHF, UHF, S, XLEOFlown LEOYes
Alén Space Spain1800.2°/0.1°VHF, UHF, SLEOFlown LEONo
Artemis Space Technologies UK500.01°/0.01°UHF, S, X, Ka, KuLEOFlown LEONo
Blue Canyon Technologies USA270.003°/0.003°L, S, XLEO, GEO, Deep SpaceFlown LEO Qualified GEO and Deep SpaceYes
C3S Electronics Development Hungary350.2°/0.2°UHF, SLEO, MEOFlown LEONo
Deimos Space Spain350.2°/0.2°UHF, XLEOFlown LEONo
EnduroSat Bulgaria84<1°/<0.6°UHF, S, XLEOFlown LEOYes
FOSSA Systems Spain301°/1°UHF, SLEOFlown LEONo
General Atomics EMS USA100.28°/0.08°UHFLEO, MEO, GEO, xGEOUnder DevelopmentYes
German Orbital Systems Germany24<1°/<1°UHF, SLEOFlown LEONo
GomSpace Denmark352.5°/2°SLEOFlown LEOYes
Gran Systems Taiwan502°/ 2°VHF, UHFLEOFlown LEOYes
GUMUSH AeroSpace Turkey80<1°/ <0.1°VHF, UHF, S, XLEOFlown LEONo
Harpy Aerospace India72<0.1°/<0.01°VHF, UHF, S, XLEO, GEO, LunarQualified LEO and LunarYes
Hex20 Australia250.003°/ 0.003°UHF, SLEO, MEO, GEO, LunarFlown LEONo
IMT Italy>510°/5°VHF, UHFLEOUnder DevelopmentNo
Innova Space Argentina7.5<15°/<15°UHFLEOFlown LEOYes
ISISPACE The Netherlands50<15°/<15°VHF, UHF, SLEOFlown LEONo
NanoAvionics Lithuania17513.20°/12.93°UHF, S, XLEOFlown LEOYes
NearSpace Launch USA1000.5°/0.2°L, UHF, S, XVLEO, LEOFlown LEOYes
NPC SPACEMIND Italy51.6<0.1°/<0.1°UHF, S, X, KaLEO, MEO, GEO, LunarFlown LEO and MEONo
Open Cosmos UK1602.4°/0.67°UHF, SLEOFlown LEONo
Orbital Astronautics UK4000.1°/ 0.01°S, X, K, Ka, OpticalLEO, MEOFlown LEONo
Orion Space Solutions USA81°/1°L, S, XLEOQualified LEOYes
Pumpkin Space Systems USA2000.05°/<0.05°UHF, S, X, KaLEOFlown LEOYes
Quub, Inc. USA445°/2°UHF, SLEO, LunarFlown LEOYes
SatRev Poland361°/0.6°UHF, SLEOFlown LEONo
SkyLabs Slovenia1000.3°/0.06°VHF, UHF, SLEO, MEOFlown LEO and MEONo
Space Flight Laboratory Canada930.009°/0.004°UHF, S, X, KaLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Space Inventor Denmark1000.01° / 0.01°VHF, UHF, S, X, LLEOFlown LEONo
Spacemanic Czech Republic300.1°/0.05°VHF, UHF, SLEO, GEO, LunarFlown LEO Qualified GEONo
Spire Global USA350.1°/0.05°UHF, L, S, X, Ka, KuLEOFlown LEOYes
Table 2-4: 6U Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the 6U category)
Organization HeadquartersPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
AAC Clyde Space Sweden150<0.1°/<0.01°VHF, UHF, S, XLEOFlown LEOYes
Alén Space Spain1800.2°/0.1°VHF, UHF, SLEOFlown LEONo
Argotec Italy80<0.02°/<0.01°UHF, S, XLEO, GEO, Deep SpaceFlown Deep Space Flown LunarYes
Artemis Space Technologies UK1000.01°/0.01°UHF, S, X, Ka, Ku, OpticalLEO, MEO, GEO, Lunar, Deep SpaceFlown LEO Qualified MEO, GEO, Lunar, and Deep SpaceNo
Astro Digital USA240<0.1°/<0.05°UHF, S, X, KaLEOFlown LEOYes
Blue Canyon Technologies USA1080.003°/0.003°L, S, XLEO, GEO, Deep SpaceFlown LEO and Lunar Qualified GEO and Deep SpaceYes
C3S Electronics Development Hungary165<0.2°/<0.2°UHF, SLEO, MEOUnder DevelopmentNo
Deimos Space Spain400.05°/0.05°UHF, S, XLEOUnder DevelopmentNo
EnduroSat Bulgaria1120.08°/0.04°UHF, S, XLEOFlown LEOYes
General Atomics EMS USA100.28°/0.08°UHF, SLEOFlown LEOYes
German Orbital Systems Germany72<1°/<1°UHF, S, XLEOFlown LEONo
GomSpace Denmark1020.07°/0.056°S, XLEO, Deep SpaceFlown LEO Qualified Deep SpaceYes
GUMUSH AeroSpace Turkey160<0.1°/<0.05°VHF, UHF, S, XLEOUnder DevelopmentNo
Harpy Aerospace India160<0.1°/<0.01°VHF, UHF, S, XLEOQualified LEOYes
Hex20 Australia450.003°/0.003°UHF, S, XLEO, MEO, GEO, LunarFlown LEONo
IMT Italy1150.1°/0.1°VHF, UHF, S, C, XLEOUnder DevelopmentNo
ISISPACE The Netherlands100<0.3°/<0.3°UHF, S, XLEO, LunarFlown LEO Qualified for LunarNo
NanoAvionics Lithuania1750.18°/0.12°UHF, S, XLEOFlown LEOYes
NearSpace Launch USA1600.5°/0.2°L, UHF, S, XLEOFlown LEOYes
NPC SPACEMIND Italy85.2<0.1°/<0.1°UHF, S, X, KaLEO, MEO, GEO, LunarFlown LEONo
Open Cosmos UK1600.02°/0.01°UHF, S, XLEOFlown LEONo
Orbital Astronautics UK1,0000.1°/0.01°S, X, K, Ka, OpticalLEO, MEOFlown LEONo
Orion Space Solutions USA151°/1°L, S, XLEOFlown LEOYes
Pumpkin Space USA2000.05°/<0.05°UHF, S, X, KaLEO, LunarFlown LEO Qualified LunarYes
Quub, Inc.USA505°/2°UHF, S, KuLEO, LunarUnder DevelopmentYes
SatRev Poland361°/0.6°UHF, SLEOQualified LEONo
SkyLabs Slovenia2000.3°/0.06°VHF, UHF, SLEO, MEOFlown LEO and MEONo
Space Dynamics Laboratory USA4000.021°/0.021°UHF, S, X, KaLEO, GEO, GTO, Cislunar, Deep SpaceFlown LEO Qualified GEO, GTO, Lunar and Deep SpaceYes
Space Flight Laboratory Canada2400.009°/0.004°UHF, S, X, KaLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Space Inventor Denmark200<0.008°/<0.008°VHF, UHF, S, XLEOFlown LEONo
Spacemanic Czech Republic5000.1°/0.05°VHF, UHF, SLEO, GEO, LunarFlown LEO Qualified GEONo
Spire Global USA2000.1°/0.05°UHF, L, S, X. Ka, KuLEOFlown LEOYes
Terran Orbital USA1800.021°/0.007°UHF, S, XLEO, GEO, LunarFlown LEO and LunarYes
Table 2-5: 12U Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the 12U category)
Organization HeadquartersPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
AAC Clyde Space Sweden400<0.01°/<0.0075°VHF, UHF, S, X, K, Ka, Ku, OpticalLEOQualified LEOYes
Alén Space Spain1800.2°/0.1°UHF, SLEOUnder DevelopmentNo
Argotec Italy100<0.02°/<0.01°UHF, S, XLEOUnder DevelopmentYes
Artemis Space Technologies UK1500.01°/0.01°UHF, S, X, Ka, Ku, OpticalLEO, MEO, GEO, Lunar, Deep SpaceFlown LEO Qualified GEO, MEO, Lunar, and Deep SpaceNo
Blue Canyon Technologies USA1080.0025°/0.0025°L, S, XLEO, GEO, Deep SpaceFlown LEO and GEO Qualified Deep SpaceYes
C3S Electronics Development Hungary165<0.2°/<0.2°UHF, SLEO, MEOUnder DevelopmentNo
EnduroSat Bulgaria2500.08°/0.04°UHF, S, X, K/KaLEOFlown LEOYes
General Atomics EMS USA1150.3°/0.024°UHF, SLEOQualified LEOYes
GomSpace Denmark1020.07°/0.056°S, XLEOQualified LEOYes
GUMUSH AeroSpace Turkey240<0.05°/<0.05°VHF, UHF, S, XLEOUnder DevelopmentNo
Harpy Aerospace India420<0.1°/<0.01°VHF, UHF, S, X, K, Ka, Ku, OpticalLEOQualified LEOYes
Hex20 Australia1100.003°/0.003°UHF, XLEO, MEO, GEO, LunarFlown LEONo
ISISPACE The Netherlands190<0.03°/<0.03°UHF, S, X, KaLEOUnder DevelopmentNo
NanoAvionics Lithuania1750.18°/0.09°UHF, S, XLEOFlown LEOYes
Nara Space South Korea1200.05°/0.03°S, XLEOQualified LEONo
NearSpace Launch USA5000.5°/0.2°L, UHF, S, XLEO, MEOUnder DevelopmentYes
NPC SPACEMIND Italy96<0.1°/<0.1°UHF, S, X, KaLEO, MEO, GEO, LunarFlown LEONo
Open Cosmos UK1600.031°/0.027°UHF, S, XLEOFlown LEONo
Orbital Astronautics UK1,0000.05°/0.01°S, X, K, Ka, OpticalLEO, MEO, GEOFlown LEONo
Orion Space Solutions USA40 <1°/<1°L, S, X, Ka LEO, GEO Qualified LEO and GEOYes
Pumpkin Space USA4000.05°/<0.05°UHF, S, X, KaLEO, LunarQualified LEOYes
SkyLabs Slovenia5000.3°/0.06°VHF, UHF, SLEO, MEOFlown LEO and MEONo
Space Dynamics Laboratory USA4000.021°/0.021°UHF, S, X, KaLEO, GEO, GTO, Cislunar, Deep SpaceFlown LEO Qualified GEO, GTO, Lunar and Deep SpaceYes
Space Flight Laboratory Canada3220.009°/0.004°UHF, S, X, KaLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Space Information Laboratories USA1800.008°/0.008°S, X, KaLEO, GEO, LunarUnder DevelopmentYes
Space Inventor Denmark200<0.008°/<0.008°VHF, UHF, S, XLEOFlown LEONo
Spacemanic Czech Republic5000.1°/0.05°VHF, UHF, S, XLEO, GEO, LunarFlown LEO Qualified GEONo
Spire Global USA3000.1°/0.05°UHF, L, S, X, Ka, KuLEOQualified LEOYes
Terran Orbital USA1000.021°/0.007°UHF, S, XLEO, GEO, LunarFlown LEO and LunarYes
Table 2-6: 16U+ Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the 16U+ category)
Organization HeadquartersFormatPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
AAC Clyde Space Sweden16U400<0.01°/<0.0075°VHF, UHF, S, X, K, Ka, Ku, OpticalLEOQualified LEOYes
Argotec Italy16U+220<0.02°/<0.01°UHF, S, X, K, KaGEO, Deep SpaceUnder DevelopmentYes
Artemis Space Technologies UK16U2000.01°/0.01°UHF, S, X, Ka, Ku, OpticalLEO, MEO, GEO, Lunar, Deep SpaceFlown LEO Qualified GEO, MEO, Lunar, and Deep SpaceNo
Astro Digital USA16U+500<0.05°/<0.01°UHF, S, X, Ku, Ka, V, W, OpticalLEOFlown LEOYes
Blue Canyon Technologies USA16U1080.0025°/0.0025°L, S, XLEO, GEO, Deep SpaceQualified LEO, GEO and Deep SpaceYes
C3S Electronics Development Hungary16U+165<0.2°/<0.2°UHF, SLEO, MEOUnder DevelopmentNo
Deimos Space Spain16U+1000.025°/0.025°UHF, S, XLEO, Lunar, Deep SpaceUnder DevelopmentNo
EnduroSat Bulgaria16U2500.08°/0.04°UHF, S, X, K/KaLEOQualified LEOYes
German Orbital Systems Germany16U164<1°/<1°UHF, S, XLEOQualified LEONo
GomSpace Denmark16U1500.07°/0.056°S, XLEOQualified LEOYes
GUMUSH AeroSpace Turkey16U240<0.05°/<0.05°VHF, UHF, S, XLEOUnder DevelopmentNo
Harpy Aerospace India16U, 27U420<0.1°/<0.01°VHF, UHF, S, X, K, Ka, Ku, OpticalLEOQualified LEOYes
Hex20 Australia27U1500.003°/0.003°UHF, S, XLEO, MEO, GEO, LunarFlown LEONo
ISISPACE The Netherlands16U190<0.03°/<0.03°UHF, S, X, KaLEOUnder DevelopmentNo
NanoAvionics Lithuania16U1750.18°/0.09°UHF, S, XLEOFlown LEOYes
Nara Space South Korea16U1200.05°/0.03°S, XLEOFlown LEONo
NPC SPACEMIND Italy16U120<0.1°/<0.1°UHF, S, X, KaLEO, MEO, GEO, LunarUnder DevelopmentNo
Open Cosmos UK16U1600.031°/0.027°UHF, S, XLEOFlown LEONo
Orbital Astronautics UK16U, 27U1,0000.05°/0.01°S, X, K, Ka, OpticalLEO, GEO, LunarQualified LEONo
Orion Space Solutions USA16U+400<1°/<1°L, S, X, Ka, OpticalLEO, GEO, LunarQualified LEO, GEO and LunarYes
Pumpkin Space USA16U, 27U4000.05°/<0.05°UHF, S, X, KaLEO, LunarQualified LEOYes
SkyLabs Slovenia20U+500<0.005°/<0.003°VHF, UHF, SLEO, MEOFlown LEO and MEONo
Space Dynamics Laboratory USA16U+1,6000.021°/0.021°UHF, S, X, Ka, OpticalLEO, GEO, GTO, Cislunar, Deep SpaceFlown LEO Qualified GEO, GTO, Lunar and Deep SpaceYes
Space Flight Laboratory Canada16U3220.009°/0.004°UHF, S, X, KaLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Space Information Laboratories USA27U1800.008°/0.008°S, X, KaLEO, GEO, LunarUnder DevelopmentYes
Space Inventor Denmark16U200<0.008°/<0.008°VHF, UHF, S, X, L, Ka, Ku, QVLEO, GEO, MEOFlown LEO and GEONo
Spacemanic Czech Republic16U, 27U1,0000.1°/0.05°VHF, UHF, S, XLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Spire Global USA16U3000.1°/0.05°UHF, L, S, X, Ka, KuLEOFlown LEOYes
Terran Orbital USA16U1000.021°/0.007°UHF, S, XLEO, GEO, LunarFlown LEO and LunarYes

ESPA-Class

The term ESPA-class refers to the Evolved Expendable Launch Vehicle (EELV) Secondary Payload Adapter (SPA) or similar configurations. The ESPA ring typically separates the primary payload from the upper stage of the launch vehicle, and permits additional mounting locations for secondary payloads. Multiple rings can be stacked to increase the number of secondary payloads.

Table 2-7 includes ESPA-class options that may not be designed for the ESPA ring but have the mass and volume to permit adaptability to rideshare opportunities. The information in this chapter is limited to offerings with mass under 500 kg even though some variants of the ESPA ring can support higher mass. Variants of the ESPA ring include, but are not limited to, ESPA-Heavy and ESPA-Grande. Examples of ESPA rideshares are provided in Figures 2.8, 2.9, and 2.10, while Figure 2.11 shows an example of an ESPA satellite from Muon Space.

3d model
Figure 2.8: Example mission configuration using rideshare plates.
Credit: SpaceX.
a small spacecraft with solar panels in a large room
Figure 2.9: Apex Aries bus with payloads.
Credit: Apex Space.
photo
Figure 2.10: LandSat-9 ESPA Ring populated with payloads and mass ballasts.
Credit: NASA / Randy Beaudoin.
satellite bus in facility
Figure 2.11: ESPA-Class satellite bus from Muon Space during integration at SpaceX facility for Transporter 8 rideshare mission.
Credit: Muon Space via ExoLaunch and SpaceX.
Table 2-7: ESPA-Class Market Solutions
(The fields indicate maximum capability; organizations may offer multiple options including smaller capabilities within the ESPA-Class category)
Organization HeadquartersPeak Power (W)3-σ Pointing Control/ KnowledgeComm OptionsIntended DestinationMaturityUS Office
Aerospacelab Belgium1,000<0.003°/<0.003°S, X, Ka, OpticalLEO, GEOFlown LEO Under Development GEOYes
Airbus US Space & Defense USA2,2000.3°/0.3°S, Ka, OpticalLEOFlown LEOYes
Apex Space USA4,0000.005°/0.0025°UHF, S, XLEO, GEOFlown LEOYes
Argotec Italy400<0.01°/<0.008°UHF, S, X, K, KaLEO, MEO, GEO, Deep SpaceQualified LEO Under Development MEO, GEO, Deep SpaceYes
Artemis Space Technologies UK1,2500.01°/0.01°UHF, S, X, Ka, Ku, OpticalLEO, MEO, GEO, Lunar, Deep SpaceQualified LEO, MEO, GEO, Lunar and Deep SpaceNo
Astranis Space Technologies Corp. USA2,500<0.1°/<0.01°MIL-Ka, Ka, Ku, Q, V, XMEO, GEO, Cislunar, Deep Space, Polar, High InclinationFlown GEOYes
Astro Digital USA2,000<0.05°/<0.01°UHF, S, X, Ku, Ka, V, W, OpticalLEO, GEO, Deep SpaceFlown LEOYes
Astroscale USA3,5300.05°/0.025°S, X, CLEO, GEOUnder DevelopmentYes
BAES USA2,500<0.007°/<0.006°L, S, X, KaLEO, MEO, GEO, Deep SpaceFlown LEO, Qualified Deep SpaceYes
Berlin Space Technologies Germany2,500<0.017°/<0.017°S, XLEOFlown LEOYes
Blue Canyon Technologies USA1,0820.0025°/0.0025°L, S, XLEO, GEO, Deep SpaceFlown LEO and GEO Qualified Deep SpaceYes
CesiumAstro USA4,500<0.1°/<0.01°S, L, Ka, OpticalLEOUnder DevelopmentYes
CREOTECH Poland150<0.015°/<0.015°S, X, OpticalLEO, MEO, GEO, Lunar, Deep SpaceFlown LEONo
Deimos Space Spain300<0.005°/<0.005°S, X, iDRSLEOUnder DevelopmentNo
EnduroSat Bulgaria300/35000.1°/<0.008°UHF, S, X, K/KaLEOQualified LEO (300W) Under Development (3500W)Yes
General Atomics EMS USA4500.03°/0.02°S, XLEOQualified LEOYes
Harpy Aerospace India2,1000.35°/0.35°S, Ka, OpticalLEOQualified LEOYes
Hemeria France>1,000<0.03°/<0.01°S, XLEO, GEO, GTOFlown LEO Qualified GEO and GTONo
LeoStella USA2,0000.013°/0.009°UHF, S, XLEOFlown LEOYes
Lockheed Martin USA500+<0.1°/<0.1°S, X, KaLEO, GEO, Lunar, Deep SpaceFlown LEO Qualified GEO, Lunar and Deep SpaceYes
Loft Orbital USA>1,000<0.035°/<0.03°S, X, LLEOFlown LEOYes
Magellan Aerospace Canada2000.01°/0.01°S, XLEOFlown LEONo
Malin Science Space Systems USA918<0.015°/<0.015°UHF, X, KaMarsUnder DevelopmentYes
Moog USA2,000<0.050°/<0.033°S, X, Ka, OpticalLEO, GEOFlown LEO Under development GEOYes
Momentus Space USA3,0000.008°/0.008°S, X, Ka, OpticalLEO, MEO, GEO, Lunar, Deep SpaceFlown LEOYes
Muon Space USA3,0000.012°/0.03°S, X, KaLEOFlown LEOYes
NanoAvionics Lithuania6600.24°/0.09°UHF, S, XLEOFlown LEOYes
Northrop Grumman USA400<0.01°/<0.008°S, X, KaLEO, GEO, HEOFlown LEO, GEO, and HEOYes
NovaWurks USA>5,0000.002°/0.0004°UHF, S, L, X, Ka, Ku and OpticalLEO, MEO, GEO, GTO, HEO, Lunar and Deep SpaceFlown LEO and GTOYes
OHB LuxSpace Luxembourg834<0.022°/ 0.01°S, XLEOQualified LEONo
OHB Sweden Sweden1,5000.008°/0.008°S, X, LLEO, MEOFlown LEONo
Open Cosmos UK2,200<0.033°/0.03°S, XLEOUnder DevelopmentNo
Orbital Astronautics UK5,0000.05°/0.01°S, X, K, Ka, OpticalLEO, MEO, GEO, Deep SpaceQualified LEONo
Quantum Space USA1,0000.006°/0.006°S, X, KaLEO, GEO, Cislunar, Lunar, Deep SpaceUnder DevelopmentYes
Reflex Aerospace Germany>300<0.01°/<0.01°S, X, Ka, Ku, OpticalLEOUnder DevelopmentNo
Redwire Space USA6000.005°/0.0017°XLEOQualified LEOYes
Sierra Space USA5000.001°/ <0.001°UHF, S, XLEO, MEO, GEOFlown LEOYes
SITAEL Italy2,0000.0017°/0.001°S, XLEOQualified LEONo
Southwest Research Institute USA1,5500.015°/0.002°S, X, KaLEO, GEOFlown LEO Under Development GEOYes
Space Dynamics Laboratory USA1,6000.021°/0.021°UHF, S, X, Ka, OpticalLEO, GEO, GTO, Cislunar, Deep SpaceFlown LEOYes
Space Flight Laboratory Canada1,2000.009°/0.004°UHF, S, X, KaLEO, GEO, LunarFlown LEO Qualified GEO and LunarNo
Space Inventor Denmark400<0.008°/<0.008°VHF, UHF, S, X, L, Ka, Ku, QVLEO, GEO, MEOQualified LEONo
Surrey Satellite Technology Ltd. UK2,000<0.01°/<0.01°S, X, Ka, Ku, ISLLEO, LunarFlown LEO Under Development LunarNo
Terran Orbital USA1,5000.014°/0.002°UHF, S, XLEO, GEO, LunarFlown LEOYes
XPLORE USA9500.17°/ 0.018°S, XVLEO, LEO, CislunarUnder DevelopmentYes
York Space Systems USA1,5000.008°/0.004°UHF, S, X, Ka, Ku, OpticalLEO, GEO, LunarFlown LEO Qualified GEO and LunarYes

2.3 Programmatic and Systems Engineering Considerations

When determining the optimal mission design approach, small satellite mission developers should carefully evaluate the programmatic and systems engineering considerations that align most with their specific objectives and constraints. This assessment is crucial for making informed decisions that best serve the mission’s goals and requirements. Example of these considerations include:

  • Environments the system will endure during development and in flight
  • Concept of operations, including desired orbit
  • Functional and performance requirements
  • Key performance parameters with appropriate margins (e.g., mass, volume, power, data link, data budget, pointing)
  • Software considerations such as development environment and re-use
  • Technology development considerations such as flight heritage, Technology Readiness Level (TRL), and reliability
  • Risk posture for development and performance
  • Trades between performance, cost, and schedule
  • Procurement considerations such as production/lead time and contractual mechanisms
  • Licensing requirements, as applicable (e.g., RF licensing, remote sensing, export control, re-entry)

In addition to the considerations listed above, hosted orbital service missions should also consider:

  • Payload priority/mission lifetime for multi-customer/multi-manifest missions
  • Balancing costs vs payload use of platform resources (e.g., mass, volume, power, data link, data budget, pointing)

Before finalizing any mission design decisions, it is essential to thoroughly analyze and consider these factors, along with numerous other considerations, for each potential option within the trade space. Given mission system performance requirements for key performance parameters like mass, volume, power, data link, data budget, and pointing, a functional importance rating and risk-based trade study should be used to screen the many options available. In addition to functional performance, relevant flight heritage or TRL, production lead time, and any available reliability data should be included in the trades. These, as well as cost, could drive the design to be done via COTS or commercial support.

Mission developers may want to take into consideration the following guides to help them in their selection and design process:

2.4 Summary

Several vendors have pre-designed fully integrated small spacecraft buses that are space-rated and available for purchase. The market ranges from companies that are willing to heavily modify their systems to fit the customer’s needs to companies attempting to standardize their system with little to no customization in favor of a better cost proposition. This chapter consolidated a long list of providers with key characteristics to facilitate the research and down-selection process for SmallSat practitioners.

For feedback about this chapter, email: arc-sst-soa@mail.nasa.gov. Please include a business email in case of follow up questions.

References

The references in this section are provided to facilitate the process in which practitioners can obtain information from the providers. The source indicates how the information provided in this chapter was obtained.

Source definition:

2025 = organization provided the information through direct communication with the State-of-the-Art team for the current edition of the document.

2024 = organization provided the information through direct communication with the State-of-the-Art team on the 2024 edition of the document, and the team was unable to communicate with the organization to update the current edition of the document.

Web = information obtained from a provider website or NASA website

Table 2-8: List of Contact Information for Organizations in this Chapter
OrganizationSourceContact EmailWebsite
AAC Clyde Space2025enquiries@aac-clydespace.comwww.aac-clyde.space
Aerospacelab2025gerry.jansson@aerospacelab.comwww.aerospacelab.com
Airbus US Space & Defense2024deborah.horn@airbusus.comwww.airbusus.com
Alba Orbital2025contact@albaorbital.comwww.albaorbital.com
Alén Space2025sales@alen.spacewww.alen.space
Apex Space2025General Inquiries Pagewww.apexspace.com
Argotec2025info@argotecgroup.comwww.argotecgroup.com
Artemis Space Technologies2024info@spaceartemis.comwww.spaceartemis.com
Astranis Space Technologies Corp.2025scott@astranis.comwww.astranis.com
Astro Digital2025brian@astrodigital.comwww.astrodigital.com
Astroscale-us2025k.shahady@astroscale-us.comwww.astroscale-us.com
Axelspace2024Contact Pagewww.axelspace.com
BAE Systems Inc., Space and Mission Systems (BAES)2025Space & Mission Systems Team Contactwww.baesystems.com
Berlin Space Technologies2025info@berlin-space-tech.comwww.berlin-space-tech.com
Blue Canyon Technologies2024info@bluecanyontech.comwww.bluecanyontech.com
C3S Electronics Development2025info@c3s.huwww.c3s.hu
CesiumAstro2025info@cesiumastro.comwww.cesiumastro.com
CREOTECH2025kontakt@creotech.plwww.creotech.pl/space
Deimos Space2025cmentrena@deimos-space.comwww.elecnor-deimos.com
DIYSATELLITE2025gus@diysatellite.comwww.diysatellite.com
EnduroSat2025Contact Pagewww.endurosat.com
FOSSA Systems2025contact@fossa.systemswww.fossa.systems
General Atomics EMS2024Chris.white@ga.comwww.ga.com/EMS
German Orbital Systems2024info@orbitalsystems.dewww.orbitalsystems.de
GomSpace2024info@gomspace.comgomspace.com
Gran Systems2025info@gransystems.comwww.gransystems.com
GUMUSH AeroSpace2025gumush@gumush.com.trwww.gumush.com.tr
Harpy Aerospace2025jayakumar@harpyaerospace.inwww.harpyaerospace.in
Hemeria2025Contact Formwww.hemeria-group.com/en
Hex202025lloyd@hex20.com.auwww.hex20.com.au
Hydra Space Systems2025contacto@hydra-space.comwww.hydra-space.com
IMT2024giovanni.cucinella@imtsrl.itimtsrl.it
Innova Space2025info@innova-space.cominnova-space.com/en
ISISPACE2025sales@isispace.nlwww.isispace.nl
LeoStella2025mike.kaplan@leostella.comleostella.com
Lockheed Martin2025timothy.m.linn@lmco.com
Loft Orbital2025gautier@loftorbital.comwww.loftorbital.com
Magellan Aerospace2025rushi.ghadawala@magellan.aerowww.magellan.aero
Malin Space Science Systems2025yee@msss.comwww.msss.com
Moog2025Hfreeman2@moog.comwww.moog.com/markets/space
Momentus Space2025sales@momentus.spacewww.momentus.space
Muon Space2025info@muonspace.comwww.muonspace.com
NanoAvionics2025info@nanoavionics.comwww.nanoavionics.com
Nara Space2025sales@naraspace.comwww.naraspace.com
NearSpace Launch2025nsl@nearspacelaunch.comwww.nearspacelaunch.com
Northrop Grumman2025John.Dyster@ngc.com
NovaWurks2025info@NovaWurks.comwww.novawurks.com
NPC SPACEMIND2025info@npcspacemind.comwww.npcspacemind.com
OHB LuxSpace2025info@luxspace.luwww.luxspace.lu
OHB Sweden2025spacesales@ohb-sweden.sewww.ohb-sweden.se
Open Cosmos2024partnerships@open-cosmos.comopen-cosmos.com
Orbital Astronautics2024hello@orbastro.comorbastro.com
Orion Space Solutions2024contact@orionspace.comorionspace.com
Pumpkin Space Systems2025sales@pumpkininc.comwww.pumpkinspace.com
Quantum Space2025sales@quantumspace.uswww.quantumspace.us
Quub, Inc.2025info@quub.spacequub.space
Rocket LabWebspacesystems@rocketlabusa.comwww.rocketlabusa.com
Redwire Space2024sales@redwirespace.comwww.redwirespace.com
Reflex Aerospace2025sales@reflexaerospace.comwww.reflexaerospace.com
SatRev2025engage@satrev.spacewww.satrev.space
Sierra Space2025 spaceapps@sierraspace.comwww.sierraspace.com
SITAEL2025sales.space@sitael.comwww.sitael.com
SkyLabs2025sales@skylabs.siwww.skylabs.si
Southwest Research Institute2024spacecraft-info@swri.org
Space Dynamics Laboratory2025info@sdl.usu.eduwww.sdl.usu.edu
Space Flight Laboratory2025info@utias-sfl.netwww.utias-sfl.net
Space Information Laboratories2024sales@spaceinformationlabs.comwww.spaceinformationlabs.com
SpaceXWebJulianna.Scheiman@spacex.comwww.spacex.com
Space Inventor2024sales@space-inventor.comspace-inventor.com
Spacemanic2025sales@spacemanic.comwww.spacemanic.com
Spire Global2024joe.carroll@spire.comwww.spire.com
Surrey Satellite Technology Ltd.2025info@sstl.co.ukwww.sstl.co.uk
Terran Orbital2025info@terranorbital.comterranorbital.com
Varda Space IndustriesWebinfo@varda.comwww.varda.com
Xplore2024inquire@xplore.comwww.xplore.com
York Space Systems2025BD@yorkspacesystems.comwww.yorkspacesystems.com