RADARSAT-1 image quality and calibration — Continuing success in extended mission

Srivastava, Satish K.; Dantec, P. Le; Hawkins, Richard A.; Banik, B.T.; Gray, R.; Murnaghan, Kevin; Guertin, G.; Shepherd, N.

doi:10.1016/s0273-1177(03)90557-6

Cited by 11 publications

(2 citation statements)

References 3 publications

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“…To function properly, an antenna must be calibrated following deployment and frequently during mission life to adapt for changes in the system [36][37][38][39]. Figure 6 presents a simplified diagram of a phased-array antenna.…”

Section: Calibration and Coherent Beamformingmentioning

confidence: 99%

Overview of the Innovative Space-Based Radar Antenna Technology Program

Lane

Murphey

Zatman

2011

Journal of Spacecraft and Rockets

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accomplished technology development and demonstration toward a 300 m deployable space antenna under the Innovative SpaceBased Radar Antenna Technology program. Risk-reduction activities focused on deployment testing, calibration, structural metrology, and real-time compensation. A 12 m phased-array-fed reflector engineering test unit was tested in a laboratory environment and demonstrated shaping of a single-curved, parabolic-cylinder mesh surface and deployment repeatability. A 12 m engineering test unit using rigidizable-inflatable structural components was also tested, but this approach was more problematic and less robust. Finally, two antenna metrology and compensation engineering test units were tested in a compact range. The results from one were reported. Data showed that the closed-loop system minimized phase error to less than 1=30 of a wavelength, given realistic disturbance inputs.

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Section: Calibration and Coherent Beamformingmentioning

confidence: 99%

Overview of the Innovative Space-Based Radar Antenna Technology Program

Lane

Murphey

Zatman

2011

Journal of Spacecraft and Rockets

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“…The Canadian Data Processing Facility (CDPF), operated by MacDonald Dettwiler and Associates Ltd (MDA), has remained the reference processing facility for RADARSAT-1 data quality control since the start of the Maintenance Phase in Feb. 1997. Previous reports of the RADARSAT-1 calibration performance at various mission stages since launch can be found [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

The RADARSAT-1 imaging performance, 14 years after launch, and independent report on RADARSAT-2 image quality

Srivastava

Côté

Muir

et al. 2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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This paper summarizes the calibration monitoring activities of the Canadian Space Agency (CSA) executed under the RADARSAT Program. The performance history of the RADARSAT-1 SAR since its commissioning in 1996 is reviewed, along with the calibration systems and methodologies used, in the context of the mission's thirteenyear calibration history. Independent image quality measurements for the privately-owned RADARSAT-2, launched in 2008, are also presented. It is shown that the calibration parameters of the RADARSAT-1 SAR have consistently been maintained within the mission's design goals and specifications, mostly thanks to payload stability and timely recalibrations performed using the calibration ground equipment. For RADARSAT-2, CSA's measurements report outstanding image quality levels.

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