Volume XLII-5
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-5, 913–919, 2018
https://doi.org/10.5194/isprs-archives-XLII-5-913-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLII-5, 913–919, 2018
https://doi.org/10.5194/isprs-archives-XLII-5-913-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

  27 Nov 2018

27 Nov 2018

ESTABLISHMENT OF VICARIOUS CALIBRATION/VALIDATION FACILITY FOR SPACE BORNE HIGH AND MID RESOLUTION OPTICAL SENSORS

B. Santhi Sree1, N. Raghavender1, K. S. Raju1, D. Chandrasekaran1, B. Gopala Krishna1, and A. S. Kumar2 B. Santhi Sree et al.
  • 1National Remote Sensing Centre, Balanagar, Hyderabad-500037, Telangana, India
  • 2Centre for Space Science and Technology Education in Asia and the Pacific, IIRS Campus, 4, Kalidas Road, Dehradun 248001, India

Keywords: Vicarious calibration, Absolute radiometric calibration, Calibration/Validation (Cal/Val) site, Shadnagar, LSF (Line Spread Function), MTF (Modulation Transfer Function)

Abstract. Vicarious calibration refers to methods that make use of “invariant” natural targets of the Earth for the post-launch calibration of sensors. This process of calibration is useful for initial phase orbit operation of sensor and thereafter for validation during its operational span. This method of periodic evaluation of radiometric and geometric performance of the space-borne optical sensors and validation of derived radiance/reflectance is to ensure availability of consistent and accurate data products to the user community. This paper describes one such Cal/Val facility’s design, engineering aspects and realization at National Remote Sensing Centre (NRSC), Shadnagar. The target materials used for filling the Cal/Val site are studied for its reflectance. These targets have reflectance ranging from 9% to 53%, in the VNIR (Visible and Near Infra-Red) region. This paper also describes instruments used for calibration and homogeneity studies of targets for its invariance since operationalisation (January 2016). The last section of this paper is about reflectance based absolute radiometric calibration of medium resolution Indian Remote Sensing (IRS) sensor (Resourcesat and Cartosat series) using RT model and edge based LSF/MTF estimation of high resolution sensor carried out using the Cal/Val facility.