The above image represents what the current Tracking and Data Relay Satellite (TDRS) configuration is as March 2019 with 10 in-orbit TDRS in space.
After 20+ years of service, two of the first generation TDRS are retired (TDRS-1 and TDRS-4) and super-synced into an orbit about 300 miles higher than geosynchronous (GEO) where the operational fleet sits.
TDRS-A (TDRS-1)
Weight*: 2268.0 kg
Dimensions**: 17.4 meters long by 12.9 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-B
Weight*: 2200.0 kg
Dimensions**: 17.4 meters long by 12.9 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-C (TDRS-3)
Weight*: 2224.9 kg
Dimensions**: 17.3 meters long by 14.2 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-D (TDRS-4)
Weight*: 2108.0 kg
Dimensions**: 17.3 meters long by 14.2 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-E (TDRS-5)
Weight*: 2108.0 kg
Dimensions**: 17.3 meters long by 14.2 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-F (TDRS-6)
Weight*: 2108.0 kg
Dimensions**: 17.3 meters long by 14.2 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-G (TDRS-7)
Weight*: 2108.0 kg
Dimensions**: 17.3 meters long by 14.2 meters wide
Power: 1700 watts
Designed mission life: 10 years
TDRS-H (TDRS-8)
Weight*: 3196.8 kg
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2300 watts
Designed mission life: 11 years
TDRS-I (TDRS-9)
Weight*: 3196.8 kg
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2300 watts
Designed mission life: 11 years
TDRS-J (TDRS-10)
Weight*: 3196.8 kg
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2300 watts
Designed mission life: 11 years
TDRS-K (TDRS-11)
Weight*: 3454.0 kg
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2200 watts
Designed mission life: 11 years
TDRS-L (TDRS-12)
Weight*: 3455.0 kg
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2200 watts
Designed mission life: 11 years
TDRS-M
Weight*: 3770.0 kg (estimated)
Dimensions**: 21.0 meters long by 13.1 meters wide
Power: 2200 watts
Designed mission life: 11 years