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SAOCOM-1

image Figure 1 - Illustation of SAOCOM spacecraft (image credit: CONAE)

About the mission/sensor

SAOCOM (Satélite Argentino de Observación COn Microondas, Spanish for Argentine Microwaves Observation Satellite) is an Earth Observation satellite constellation of Comisión Nacional de Actividades Espaciales (CONAE) the Argentina's space agency. The constellation comprises two satellite (SAOCOM 1A and 1B) both equipped with a L-band (12.75 GHz) full polarimetric SAR sensor.

SAR acquistion imaging modes are TOPSAR Wide (TW), TOPSAR Narrow (TN) and Stripmap (SM) with Single, Dual (HH/HV, VV/VH) and Quad Polarization.

image Figure 2 - SAOCOM-1 Measurement modes (image credit: CONAE)

Main characteristics of the Level 1 products of the SAOCOM-1 mission are aviable in the table below (RD01).

Beam Mode Beam

Position

Minimum

Incidence Angle Range

Nominal Spatial

Resolution

Minimum

Swath

Width

(ground

range)

[km]

Nominal

Azimuth

Length

[km]

Nominal Equivalent

Number of Looks

L1A

Products

L1B, L1C,

and L1D

Products

L1A

(SLC)

L1B (DI),

L1C (GEC), L1D (GTC)

Near

range

[deg]

Far

range

[deg]

Ground

Range x

Azimuth

[m x m]

Ground

Range x

Azimuth

[m x m]

Stripmap

Single Pol

and Dual Pol

S1 20.7 25.0 10 x 5 10 x 10 49.7 74.1 1 2
S2 24.9 29.2 52.3
S3 29.1 33.8 61.4
S4 33.7 38.3 65.7
S5 38.2 41.3 49.1
S6 41.3 44.5 55.6
S7 44.6 47.1 48.0
S8 47.2 48.7 31.9
S9 48.8 50.2 31.1
Stripmap

Quad Pol

S1 17.6 19.6 10 x 6 10 x 10 21.9 74.1 1 2
S2 19.5 21.5 22.0
S3 21.4 23.3 21.0
S4 23.2 25.4 25.4
S5 25.3 27.3 23.4
S6 27.2 29.6 29.4
S7 29.6 31.2 20.9
S8 31.2 33.0 25.1
S9 33.0 34.6 22.1
S10 34.6 35.5 14.2
TOPSAR

Narrow

Single Pol

and Dual Pol

TNA 24.9 38.3 10 x 30 30 x 30 176.3 222.3 1 3
TNB 38.2 47.1 150.2
TOPSAR

Narrow

Quad Pol

TNA 17.6 27.3 10 x 50 50 x 50 109.9 222.3 1 5
TNB 27.2 35.5 108.8
TOPSAR

Wide Single Pol and Dual Pol

TW 24.9 48.7 10 x 50 50 x 50 353.7 444.6 1 5
TOPSAR

Wide Quad

Pol

TW 17.6 35.5 10 x 100 100 x 100 218.1 444.6 1 10

Native format

CONAE contributes to the Charter with the provision of radiometrically calibrated, geocoded and georeferenced radar data from SAOCOM-1 A/B satellites. Imported Dataset in the ESA Charter Mapper from COS-2 are SAR Geocoded Terrain Corrected (GTC) L1D products.

SAOCOM-1 GRD acquisitions are provided to the Charter as XML Annotated SAR Ground Terrain Corrected Image within a compressed archive containing:

  • an XEMT metadata file
  • XML and BIN files for Data (includes multiple single-band GRD product for each polarization)
  • XML and BIN files for Quality
  • XML and BIN files for Config
  • a KML file of Scene Quicklook Map Overlay
  • a PNG file of Merged Beams Quicklook

Reference Documents

RD01 - Saocom-1 Level 1 Products Format, CONAE, Jan 2020.

Reference Websites

RW01 - SAOCOM official website