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SAR Satellite Calibration Service

SAR Active Calibration

It can provide high-precision radiometric calibration services for spaceborne SAR systems in different bands.

Service Introduction

SAR multi-band active calibration can perform high-precision radiometric calibration for spaceborne SAR systems in different bands. It can be used for scientific tasks such as relative radiation calibration, absolute radiation calibration and radiation quality evaluation of SAR satellites in different bands (geometric calibration, radiation calibration and beam pointing measurement).

Three Working Modes

Receive Mode

Only receive radar signals, the continuous working time can be set separately for envelope data and IQ data

Forwarding Mode

Corresponding to 40-55dBsm RCS
For radiometric calibration and image quality assessment
No signal acquisition
HH forwarding is possible for L band
VV forwarding can be performed on the Ka band
HH forwarding, VV forwarding, HV forwarding or VH forwarding for C and X bands

Receive/Forward Mode

Receive signal acquisition while forwarding

Technical Parameters

L-band center frequency and signal bandwidth range: 1.26GHz±100MHz;	C-band center frequency and signal bandwidth range: 5.4GHz±120MHz;
X-band center frequency and signal bandwidth range: 9.6GHz±600MHz;	Ka-band center frequency and signal bandwidth range: 35.75GHz±600MHz;
Stability: better than 0.2dB;	Adjustable radar cross-sectional area: 40dB~55dB, 5dB steps;
Nominal accuracy of radar cross-sectional area: better than 0.2dB;	Radar cross-sectional area stability: better than 0.2dB;

Manual

Purchase SAR radiometric calibration service and fill in the parameters

Satellite transit, active SAR calibrator work

Users provide SAR satellite transit images

Emposat submits data processing report

Automatic Angle Reflector Calibration

Service Introduction

Used for SAR satellite geometric calibration/radiometric calibration, quality evaluation, etc.

The automatic angle reflector can form a strong brightness area on the SAR satellite image, and it is easy to accurately extract the "bright spot" center, which can provide high-precision control point information for the geometric calibration of the SAR system.

Emposat automatic angle reflector calibration equipment is installed in the desert area with relatively stable scattering characteristics in Zhongwei, Ningxia, and is arranged in a grid pattern; the east-west interval is 1km, 2km, 3km, and 9km; the north-south interval is about 5km, and the specific location is shown in the figure.

Automatic angle reflector (passive) (site layout - position of each point)

Technical Parameters

Angle reflector size: the right-angle side is 1m	Pointing accuracy: 0.1° in azimuth, 0.1° in elevation
Range of incident angle: 10°-60°	RCS accuracy: better than 0.2dB (reference band: X)
RCS stability: 1m at right angles

Manual

Purchase the automatic angle reflector calibration service and fill in the parameters

satellite transit, automatic angle reflector work

user provides SAR satellite transit images

Emposat submits data processing report

010-52894569

13621005870

service@emposat.com

Block B, Yingchuang Power Park, Haidian District, Beijing

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Beijing Public Network Security 11010802026754