Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/22/2011 | 0000 | 08/19/2014 | 2359 | Suspect |
Subject: | MAO/PGH/PVC/SGP/SASHE/C1 - Reprocess: Stray light contamination at extreme wavelengths |
DataStreams: | sgpsashemfrC1.b1, sgpsashevislowsunC1.a0, sgpsashevisC1.b1, pvcsashenirhisunM1.a0, pghsashevislowsunM1.a0, pvcsashemfrM1.b1, maosashevisM1.b1, sgpsashevishisunC1.a0, pvcsashevislowsunM1.a0, maosashevislowsunM1.a0, pvcsashevisM1.b1, maosashenirM1.b1, sgpsashenirlowsunC1.a0, sgpsashenirhisunC1.a0, pghsashenirlowsunM1.a0, pvcsashenirM1.b1, pghsashevishisunM1.a0, pghsashenirhisunM1.a0, maosashevishisunM1.a0, sgpsashenirC1.b1, maosashenirlowsunM1.a0, maosashenirhisunM1.a0, pvcsashenirlowsunM1.a0, pvcsashevishisunM1.a0 |
Description: | The irradiance measurements at near the limits of the spectrometer wavelength ranges are subject to contamination from stray light within the spectrometer itself. This affects not only the basic measurement, but also can affect the calibration such that reported values may be either higher or lower than actual. Typically, this yields a high bias for measurements at the low wavelength limit and a low bias at the high wavelength limit. This causes opposite effects for AOD with a low bias at low wavelength and a high bias for high wavelengths. |
Suggestions: | Avoid using the irradiance, atmospheric transmittance, and optical depth data below 450 nm and above 940 nm for the VIS spectrometer and below 1000 nm or above 1600 nm for the NIR spectrometer. |
Measurements: | pghsashevishisunM1.a0: more
pghsashevislowsunM1.a0: more sgpsashemfrC1.b1: more sgpsashevisC1.b1: more sgpsashenirlowsunC1.a0: more pvcsashenirM1.b1: more sgpsashenirhisunC1.a0: more maosashenirlowsunM1.a0: more pvcsashenirhisunM1.a0: more pvcsashemfrM1.b1: more maosashenirhisunM1.a0: more pghsashenirlowsunM1.a0: more sgpsashenirC1.b1: more pvcsashevishisunM1.a0: more sgpsashevishisunC1.a0: more maosashevisM1.b1: more pvcsashenirlowsunM1.a0: more maosashevishisunM1.a0: more pghsashenirhisunM1.a0: more maosashenirM1.b1: more pvcsashevislowsunM1.a0: more sgpsashevislowsunC1.a0: more maosashevislowsunM1.a0: more pvcsashevisM1.b1: more |