spacer
Field measurement support for in-flight validation/calibration science

Betina Pavri
15 December 1999



  • drive out to experiment location before sunrise; set up sun photometer at sunrise so it can track sun until after solar noon


  • set up two tarps, 240m apart, with a line of flags between them, 1 flag every 20m. line should be aligned with flightline of plane over playa


  • **collect several hundred spectra**  in the 200m region between the tarps (none in the 20m pixels closest to each tarp) to completely characterize this region.


  • derive average spectra for playa


  • derive atmospheric transmission values from sun photometer measurements


  • use playa spectra and atmospheric transmission to model at-AVIRIS radiance


  • locate tarps in AVIRIS image, and extract radiance of 10 pixels between them


  • compare this radiance with actual AVIRIS radiance, and compare results
 

spacer