Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
09/30/1997 | 1600 | 09/30/1997 | 1700 | Suspect |
Subject: | CO2 Suppression of AERI Spectra |
DataStreams: | sgpaerilbldiffssC1.c1, sgpaerich2C1.a2, sgpaeri01ch2C1.a1, sgpaeriprofC1.c1, sgpaerisummaryC1.a1, sgpqmeaeriprofC1.c1, sgpaerisummaryC1.a2, sgpaerilbldiffC1.c1, sgpqmeaerilbllsC1.c1, sgpqmeaerilblC1.c1, sgpqmeaerimeansC1.c1, sgpaeri01summaryC1.a1, sgpaerilblcloudsC1.c1, sgpaerich1C1.a1, sgpaeri01ch1C1.a1, sgpaerich2C1.a1, sgpaerich1C1.a2, sgpaerilbldifflsC1.c1, sgpaeriC1.00, sgpqmeaerimeansssC1.c1, sgpqmeaerilblssC1.c1, sgpaeri01engineerC1.a1 |
Description: | At about 1600 UTC 30 September 1997 (970930), the CO2 fire suppression system in the optical trailer went off and AERI-01 detected a local cooling due to the colder air being forced out of the trailer. Over the next few minutes, the CO2 accumulated outside the trailer causing lower transmission to space in the 15 micron region and AERI-01 therfore detected warmer temperatures closer to the surface (T profile decreases with altitude). As more CO2 exited the trailer, the atmosphere at 15 microns became more and more opaque and AERI looses nearly all responsivity in this region. AERI gradually regains responsivity over the next 30 minutes or so as the CO2 diffuses. The strongest absorbing on-line regions from ~650-680 wavenumbers are the last to recover around 1700 UTC. A graphical description of the effect described can be found at: http://www.iop.sgp.arm.gov/~davet/970930/aeri01/index.html Besides the enhanced CO2, the instrument is effected by the rapid change of temperature of inside the optical trailer. This makes all the AERI data during the period 970930 16:00 - 17:00 UTC questionable. |
Suggestions: | Problem fixed itself when trailer temperatures returned to normal. No action is required. |
Measurements: | sgpaerilbldiffssC1.c1:
sgpqmeaeriprofC1.c1:
sgpqmeaerimeansssC1.c1:
sgpqmeaerilbllsC1.c1:
sgpaerich1C1.a1:
sgpaerich1C1.a2:
sgpaerilbldiffC1.c1:
sgpaeri01ch2C1.a1:
sgpaerilblcloudsC1.c1:
sgpqmeaerimeansC1.c1:
sgpaeri01engineerC1.a1:
sgpqmeaerilblC1.c1:
sgpaeriprofC1.c1:
sgpaerisummaryC1.a1:
sgpaeriC1.00:
sgpaerisummaryC1.a2:
sgpaeri01ch1C1.a1:
sgpaerilbldifflsC1.c1:
sgpqmeaerilblssC1.c1:
sgpaeri01summaryC1.a1:
sgpaerich2C1.a2:
sgpaerich2C1.a1:
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