The main characteristics of the SRAL (SENTINEL-3 Ku/C Radar Altimeter) are:
- possible radar measurement modes: LRM and SAR (operating 100% in SAR in orbit)
- tracking modes: closed and open-loop
- pulse repetition frequency: 1.9 KHz (LRM), 17.8 KHz (SAR)
- total range error: 3 cm
- launch mass: 60 kg.
The main characteristics of the MWR (MicroWave Radiometer) are:
- dual frequency, 23.8 / 36.5 GHz
- radiometric accuracy, 3 K absolute (0.6 K relative)
- launch mass: 26 kg.
Precise Orbit Determination (POD) including:
- GNSS receiver (Global Navigation Sat. System)
- DORIS Doppler Orbitography and Radiopositioning Integrated by Satellite
- LRR Laser Retro reflector
Figure 1: SRAL Instrument (Credit: ESA)
Figure 2: MWR Instrument (Credit: ESA)
Figure 3: DORIS Instrument (Credit: ESA)
Figure 4: GNSS Instrument (Credit: ESA)
Figure 5: LRR Instrument (Credit: ESA)