Name
Title | ||
|---|---|---|
Stability Assessment of OCO-2 Radiometric Calibration Using Aqua MODIS as a Reference. |
Abstract | ||
|---|---|---|
With three imaging grating spectrometers, the Orbiting Carbon Observatory-2 (OCO-2) measures high spectral resolution spectra (lambda/Delta lambda approximate to 19,000) of reflected solar radiation within the molecular oxygen (O-2) A-band at 0.765 mu m and two carbon dioxide (CO2) bands at 1.61 and 2.06 mu m. OCO-2 uses onboard lamps with a reflective diffuser, solar observations through a transmissive diffuser, lunar measurements, and surface targets for radiometric calibration and validation. Separating calibrator aging from instrument degradation poses a challenge to OCO-2. Here we present a methodology for trending the OCO-2 Build 8R radiometric calibration using OCO-2 nadir observations over eight desert sites and nearly simultaneous observations from Moderate Resolution Imaging Spectroradiometer (MODIS) with sensor viewing zenith angles of 15 +/- 0.5 degrees. For the O-2 A-band, this methodology is able to quantify a drift of -0.8 +/- 0.1% per year and capture a small error in correcting the aging of the solar calibrator. For the other two OCO-2 bands, no measurable changes were seen, indicating less than 0.1% and less than 0.3% per year drift in the radiometric calibration of Band 2 and Band 3, respectively. |
Year | DOI | Venue |
|---|---|---|
2020 | 10.3390/rs12081269 | REMOTE SENSING |
Keywords | DocType | Volume |
radiometric calibration,validation,OCO-2,MODIS,pseudo invariant calibration sites | Journal | 12 |
Issue | Citations | PageRank |
8 | 0 | 0.34 |
References | Authors | |
0 | 13 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Shanshan Yu | 1 | 0 | 0.34 |
| Robert Rosenberg | 2 | 1 | 2.44 |
| Carol J. Bruegge | 3 | 177 | 80.53 |
| Lars Chapsky | 4 | 1 | 1.76 |
| Dejian Fu | 5 | 0 | 0.34 |
| Richard A. M. Lee | 6 | 1 | 2.10 |
| Thomas E. Taylor | 7 | 0 | 0.34 |
| Heather Cronk | 8 | 0 | 0.34 |
| Christopher W. O'Dell | 9 | 22 | 6.92 |
| Amit Angal | 10 | 72 | 27.54 |
| Xiaoxiong Xiong | 11 | 427 | 123.62 |
| david crisp | 12 | 9 | 3.68 |
| Annmarie Eldering | 13 | 16 | 10.41 |