MISR: In-Flight Radiometric Calibration and Characterization Plan

More documents

Recommendations

Info

7.5 LOCAL MODE TARGET SELECTIONIn order to conduct the above investigations, MISR will routinely make use of Level 1AScience data, particularly those images acquired in Local Mode (LM). These targets can becategorized into the following groups:• high contrast scenes, including lakes and cloud over ocean scenes; and• intensive vicarious field campaign sites;• stable desert regions;• spectrally interesting scenes (e.g. vegetation)The IFRCC Team will work with the Science Team in the selection of LM sites.7. Characterization60
8. CALIBRATION INTEGRITYCalibration integrity is the IFRCC program element that validates the Level 1B1Radiometric Product, as well as the out-of-band correction which occurs at Level 2. It alsoprovides for quality assessment, and demonstrates traceability of the radiance scale tointernational standards. These tasks are described in this chapter.8.1 LEVEL 1B1 RADIOMETRIC PRODUCT VALIDATIONValidation confirms that Level 1B1 DAAC processing is generating radiances per theformulism of the [L1Rad ATB] and per the accuracy requirements specified in the [ISR]. Theprocess of generating radiances using multiple methodologies is in itself a validation. Theradiances derived from the OBC and VC approaches are completely independent, and therebyestablish both the response of the sensor, and uncertainties in using these response coefficients tomeasure incoming radiances.There are several validation approaches to be developed by the IFRCC team: that of asensor cross-comparison, desert scene views, and lunar observations. Whereas the approachesdescribed in Chapter 5 provide a continual check on the reported product, these latter analyses arenot routine. Development for these latter tasks will begin once the in-flight calibration andcharacterizations tools are fully developed. That is, these are activities which will be developedpost-launch. At most one sensor cross-comparison (per sensor) will be made each year. Desertscene data will be collected and summarized, as available from cloud-free, Local Modeobservations. Lunar observations are mentioned here only for completeness. The analysis of thesedata actually have not been planned for at this time, due to the uncertainty of their availability.8.1.1 Sensor cross-comparisonIn-flight cross-calibration between sensors can be conducted when the sensors have:• Similar spectral bands that cover part or all of the same spectral range and image thesame scene simultaneously but with different IFOVs; for example ASTER, MISR, andMODIS.• Similar spectral bands and IFOVs but do not image the same scene simultaneously; forexample, MISR, Landsat-TM, and SPOT.No attempt will be made to calibrate MISR by these techniques, as other sensors are notcalibrated to the 3% accuracy of MISR. Further, the transfer of calibration from one sensor toanother is less accurate than calibrating a sensor directly. What can be determined, however, is theradiance bias to within a 7-10% range of uncertainty. This will be done, particularly betweenMODIS and MISR sensors. MODIS is the preferred sensor to establish a cross-comparison with,as• MODIS is on the same platform, and a cross-comparison will add value to theproducts making use of the synergy of data sets;In-flight Radiometric Calibration and Characterization Plan, JPL D-1331561
Page 6:
10.4.2 Radiative transfer. . . . .
Page 9 and 10: 1. INTRODUCTION1.1 PURPOSEThis docu
Page 11 and 12: • MISR Algorithm Development Plan
Page 13 and 14: 2.1 MISR SCIENCE OBJECTIVES2. EXPER
Page 15 and 16: In addition to these modes, the ins
Page 17 and 18: Table 2.1. Level 1A productProductL
Page 19 and 20: Table 2.4. Level 1B1 Ancillary Radi
Page 21 and 22: 3. CALIBRATION OVERVIEW3.1 REQUIREM
Page 23 and 24: equally to filter pinholes or scatt
Page 25 and 26: PREFLIGHTDATAIFRCCactivityOtheracti
Page 27 and 28: Multiple methodologies are utilized
Page 29 and 30: laboratory environment. This includ
Page 31 and 32: 4. PREFLIGHT CALIBRATION AND CHARAC
Page 33 and 34: determination was originally planne
Page 35 and 36: Cause: The filters are non uniform
Page 37 and 38: is the affected area is about 30 pi
Page 39 and 40: 5. IN-FLIGHT RADIOMETRIC CALIBRATIO
Page 41 and 42: esponse functions will be verified
Page 43 and 44: the array. Dark current is expected
Page 45 and 46: OBC design effort. The actual uncer
Page 47 and 48: 5.2.1 High-altitude sensor-based ca
Page 49 and 50: laboratory measurements. In order t
Page 51 and 52: 6. LEVEL 1B1 RADIOMETRIC PRODUCT AL
Page 53 and 54: flight. Generation of the updated p
Page 55 and 56: 7. CHARACTERIZATIONThe radiance unc
Page 57 and 58: 7.1.4 PolarizationMISR has been des
Page 59: It is believed that the evaluation
Page 63 and 64: The baseline CAM is the most useful
Page 65 and 66: had all lamps on, and the satellite
Page 67 and 68: 9. MANAGEMENT9.1 PERSONNEL ROLES9.1
Page 69 and 70: EurOpto (preflight radiometriccal.)
Page 71 and 72: PRINCIPALINVESTIGATORDavid J. Diner
Page 73 and 74: • Identifying/specifying all of t
Page 75 and 76: 10. REFERENCES10.1 MISR EXPERIMENT(
Page 77 and 78: 10.3 IN-FLIGHT CALIBRATION METHODOL
Page 79 and 80: 38. Vane, G., T.G. Chrien, J.H. Rei
Page 81 and 82: APPENDIX A. NOMENCLATUREThe followi
Page 83 and 84: A.4 CHARACTERIZATIONcalibration. Th
Page 85 and 86: G 0 , G 1 , and G 2 are the respons
Page 87 and 88: APPENDIX B. CALIBRATION MODE SEQUEN
Page 89 and 90: In Cal-Dark data are acquired over
Page 91 and 92: Config. Home Run is a commanding of
Page 93 and 94: Repeat for 200 line repeat times, t
show all

MISR: In-Flight Radiometric Calibration and Characterization Plan

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?