Compiled from the 2026 Extended Parameters Survey, agency-nominated technical contacts and published user guides; not yet collected through the annual CEOS MIM survey.
Polarisation Channels
HH · HV · VV · VH
Polarisation Modes
single · dual · quad · compact
Antenna
Active planar array antenna (C-band), three 2 m x 2 m panels — 6 × 2 m
Polarisation Notes
Single (HH/HV/VV/VH), dual, full-pol and hybrid-circular polarimetry (transmit circular, receive H+V linear). Full-pol available in FRS-1/FRS-2/MRS/CRS, not HRS. Hybrid-circular (C-) variants available in all modes.
Source
NRSC EOS-04 (RISAT-1A) Hand Book, Doc. No. NRSC-DPA-NDC-OCT 2022-TG-0002110-V1.0; ARD context: ISRO EOS-04 CEOS-ARD NRB self-assessments v1.0/v1.1 (ceos.org/ard)
Compiled from the 2026 Extended Parameters Survey, agency-nominated technical contacts and published user guides; not yet collected through the annual CEOS MIM survey.
| Mode | Resolution az × rg (m) | Swath (km) | Polarisation | Bandwidth (MHz) | Feeds product |
|---|
| Medium Resolution ScanSAR (MRS) MRS 8-beam ScanSAR mode (6-beam variant also operable). The acquisition mode behind the certified EOS-04 CEOS-ARD NRB 18 m scene products and the MRS India Mosaic. | 23 × 37.7 | 160 | HH, HV, VV, VH, HH+HV, VV+VH, quad, RH+RV (hybrid circular) | 18.75 | RISAT-1A (EOS-04) NRB (CEOS-ARD) · RISAT-1A (EOS-04) NRB India Mosaic (CEOS-ARD) |
| Coarse Resolution ScanSAR (CRS) CRS 12-beam ScanSAR mode; 20 km effective sub-swaths totalling 223 km. The acquisition mode behind the certified EOS-04 CEOS-ARD NRB 36 m scene products. | 55 × 37.7 | 223 | HH, HV, VV, VH, HH+HV, VV+VH, quad, RH+RV (hybrid circular) | 18.75 | RISAT-1A (EOS-04) NRB (CEOS-ARD) |