An overview of MODIS radiometric calibration and characterization

The Moderate Resolution Imaging Spectroradiometer (MODIS) is one of the key instruments for NASA’s Earth Observing System (EOS), currently operating on both the Terra and Aqua satellites. The MODIS is a major advance over the previous generation of sensors in terms of its spectral, spatial, and temporal resolutions. It has 36 spectral bands: 20 reflective solar bands (RSB) with center wavelengths from 0.41 to 2.1 µm and 16 thermal emissive bands (TEB) with center wavelengths from 3.7 to 14.4 µm, making observations at three spatial resolutions: 250 m (bands 1–2), 500 m (bands 3–7), and 1km (bands 8–36). MODIS is a cross-track scanning radiometer with a wide field-of-view, providing a complete global coverage of the Earth in less than 2 days. Both Terra and Aqua MODIS went through extensive pre-launch calibration and characterization at various levels. In orbit, the calibration and characterization tasks are performed using its on-board calibrators (OBCs) that include a solar diffuser (SD) and a solar diffuser stability monitor (SDSM), a v-grooved flat panel blackbody (BB), and a spectro-radiometric calibration assembly (SRCA). In this paper, we present au overview of MODIS calibration and characterization activities, methodologies, and lessons learned from pre-launch characterization and in-orbit operation. Key issues discussed in this paper include in-orbit efforts of monitoring the noise characteristics of the detectors, tracking the solar diffuser and optics degradations, and updating the sensor’s response versus scan angle. The experiences and lessons learned through MODIS have played and will continue to play major roles in the design and characterization of future sensors.

[1]  Aisheng Wu,et al.  On-orbit characterization of RVS for MODIS thermal emissive bands , 2004, SPIE Asia-Pacific Remote Sensing.

[2]  Xiaoxiong Xiong,et al.  An overview of the Earth Observing System MODIS instrument and associated data systems performance , 2002, IEEE International Geoscience and Remote Sensing Symposium.

[3]  Xiaoxiong Xiong,et al.  Prelaunch algorithm and data format for the Level 1 calibration products for the EOS-AM1 Moderate Resolution Imaging Spectroradiometer (MODIS) , 1998, IEEE Trans. Geosci. Remote. Sens..

[4]  Kurtis J. Thome,et al.  Vicarious calibration of Aqua and Terra MODIS , 2003, SPIE Optics + Photonics.

[5]  Thomas S. Pagano,et al.  Prelaunch characteristics of the Moderate Resolution Imaging Spectroradiometer (MODIS) on EOS-AM1 , 1998, IEEE Trans. Geosci. Remote. Sens..

[6]  Claire L. Parkinson,et al.  Aqua: an Earth-Observing Satellite mission to examine water and other climate variables , 2003, IEEE Trans. Geosci. Remote. Sens..

[7]  Junqiang Sun,et al.  Radiometric stability monitoring of the MODIS reflective solar bands using the Moon , 2003 .

[8]  Xiaoxiong Xiong,et al.  Status of Terra MODIS and Aqua MODIS , 2002, IEEE International Geoscience and Remote Sensing Symposium.

[9]  Jun-Qiang Sun,et al.  MODIS reflective solar bands calibration algorithm and on-orbit performance , 2003, SPIE Asia-Pacific Remote Sensing.

[10]  Nianzeng Che,et al.  Terra MODIS on-orbit spectral characterization and performance , 2005, IEEE Transactions on Geoscience and Remote Sensing.

[11]  Nianzeng Che,et al.  Aqua MODIS first year on-orbit calibration and performance , 2004, SPIE Remote Sensing.

[12]  William L. Barnes,et al.  MODIS on-orbit calibration and characterization , 2003 .

[13]  Xiaoxiong Xiong,et al.  MODIS on-orbit characterization using the Moon , 2003, SPIE Remote Sensing.

[14]  Xiaoxiong Xiong,et al.  On-orbit characterization of a solar diffuser’s bidirectional reflectance factor using spacecraft maneuvers , 2003, SPIE Optics + Photonics.

[15]  Jun-Qiang Sun,et al.  Degradation of MODIS optics and its reflective solar bands calibration , 2001, Remote Sensing.

[16]  Xiaoxiong Xiong,et al.  On-orbit performance of the Earth Observing System Moderate Resolution Imaging Spectroradiometer; first year of data , 2002 .

[17]  Nianzeng Che,et al.  On-orbit spectral characterization results for of the Terra MODIS reflective solar bands , 2003, SPIE Optics + Photonics.

[18]  Aisheng Wu,et al.  Intercomparison of the 11- and 12-μm bands of Terra and Aqua MODIS using NOAA-17 AVHRR , 2003, SPIE Optics + Photonics.

[19]  Xiaoxiong Xiong,et al.  Lessons learned from MODIS calibration and characterization , 2002 .

[20]  Xiaoxiong Xiong,et al.  MODIS thermal emissive bands calibration algorithm and on-orbit performance , 2003, SPIE Asia-Pacific Remote Sensing.