File name: Pandora77s1_Singapore-NUS_L2_rwvt1p1-9.txt
File generation date: 20260122T104008.5Z
Data description: Level 2 file (columns and more)
Data file version: rwvt1p1-9
Data product status: Water vapor data are official
Local principal investigator: Santo V. Salinas
Network principal investigator: Alexander Cede
DOI: 10.48596/pgn.rwvt1p1-9.Singapore-NUS.P77s1
Instrument type: Pandora
Instrument number: 77
Spectrometer number: 1
Processing software version used: BlickP v1.9.5
Full location name: Centre for Remote Imaging Sensing and Processing (CRISP), National University of
Short location name: Singapore-NUS
Country of location: Singapore
Location latitude [deg]: 1.2990
Location longitude [deg]: 103.7710
Location altitude [m]: 77
Data start time: NONE
Data end time: NONE
Nominal first and last wavelength inside fitting window [nm]: 492.0315 509.9428
Data caveats: Based on session 1 for OoB CF
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Column 1: UT date and time for measurement center, yyyymmddThhmmssZ (ISO 8601)
Column 2: Fractional days since 1-Jan-2000 UT midnight for measurement center
Column 3: Effective duration of measurement [s]
Column 4: Solar zenith angle for measurement center [deg]
Column 5: Solar azimuth for measurement center [deg], 0=north, increases clockwise
Column 6: Lunar zenith angle for measurement center [deg]
Column 7: Lunar azimuth for measurement center [deg], 0=north, increases clockwise
Column 8: rms of unweighted fitting residuals, -9=fitting not successful
Column 9: Normalized rms of fitting residuals weighted with independent uncertainty, -9=fitting not successful or no uncertainty given
Column 10: Expected rms of unweighted fitting residuals based on independent uncertainty, -9=fitting not successful or no uncertainty given
Column 11: Expected normalized rms of weighted fitting residuals based on independent uncertainty, -9=fitting not successful or no uncertainty given
Column 12: Climatological station pressure [mbar]
Column 13: Data processing type index
Column 14: Calibration file version
Column 15: Calibration file validity starting date
Column 16: Mean value of measured data inside fitting window [same units as measurements]
Column 17: Wavelength effective temperature [°C], 999=no effective temperature given
Column 18: Estimated average residual stray light level [%] (only valid for stray light correction methods 2 and higher)
Column 19: Retrieved wavelength shift from L1 data [nm], -9=no wavelength change determination
Column 20: Retrieved total wavelength shift [nm], -9=no wavelength change fitting
Column 21: Integration time [ms]
Column 22: Number of bright count cycles
Column 23: Effective position of filterwheel #1, 0=filterwheel not used, 1-9 are valid positions
Column 24: Effective position of filterwheel #2, 0=filterwheel not used, 1-9 are valid positions
Column 25: Atmospheric variability [%], 999=no atmospheric variability was determined
Column 26: Estimated aerosol optical depth at starting wavelength of fitting window
Column 27: Estimated aerosol optical depth at center wavelength of fitting window
Column 28: Estimated aerosol optical depth at ending wavelength of fitting window
Column 29: L1 data quality flag, 0=assured high quality, 1=assured medium quality, 2=assured low quality, 10=not-assured high quality, 11=not-assured medium quality, 12=not-assured low quality
Column 30: Sum over 2^i using those i, for which the corresponding L1 data quality parameter exceeds the DQ1 limit, 0=Saturated data, 1=Too few dark counts measurements, 2=No temperature given or effective temperature too different from the reference temperature, 3=Dark count too high, 4=Unsuccessful dark background fitting, 5=The dark count differs significantly from the dark map for too many pixels, 6=Absolute value of estimated average residual stray light level too high, 7=Although attempted, no wavelength change could be retrieved, 8=Absolute value of retrieved wavelength shift too large, 9=Retrieved wavelength shift differs too much from the shift predicted by the effective temperature
Column 31: Sum over 2^i using those i, for which the corresponding L1 data quality parameter exceeds the DQ2 limit (same parameters as for DQ1)
Column 32: L2Fit data quality flag, 0=assured high quality, 1=assured medium quality, 2=assured low quality, 10=not-assured high quality, 11=not-assured medium quality, 12=not-assured low quality
Column 33: Sum over 2^i using those i, for which the corresponding L2Fit data quality parameter exceeds the DQ1 limit, 0=L1 data quality above 0, 1=Spectral fitting was not successful, 2=Wavelength shift too large, 3=Normalized rms of fitting residuals weighted with independent uncertainty too large
Column 34: Sum over 2^i using those i, for which the corresponding L2Fit data quality parameter exceeds the DQ2 limit (same parameters as for DQ1)
Column 35: L2 data quality flag for water vapor, 0=assured high quality, 1=assured medium quality, 2=assured low quality, 10=not-assured high quality, 11=not-assured medium quality, 12=not-assured low quality, 20=unusable high quality, 21=unusable medium quality, 22=unusable low quality
Column 36: Sum over 2^i using those i, for which the corresponding L2 data quality parameter for water vapor exceeds the DQ1 limit, 0=L2Fit data quality above 0, 1=Retrieval error, 2=Air mass factor too large, 3=Atmospheric variability too large
Column 37: Sum over 2^i using those i, for which the corresponding L2 data quality parameter for water vapor exceeds the DQ2 limit (same parameters as for DQ1)
Column 38: Water vapor total vertical column amount [moles per square meter], -9e99=retrieval not successful
Column 39: Independent uncertainty of water vapor total vertical column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -5=no independent uncertainty input was given, -9=spectral fitting not successful
Column 40: Structured uncertainty of water vapor total vertical column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no structured uncertainty could be retrieved, -5=no independent uncertainty input was given, -7=not given since method MEAS was chosen, -9=spectral fitting not successful
Column 41: Common uncertainty of water vapor total vertical column amount [moles per square meter], -1=cross section is zero in this wavelength range, -6=no common uncertainty input was given, -7=not given since method MEAS was chosen, -9=spectral fitting not successful
Column 42: Total uncertainty of water vapor total vertical column amount [moles per square meter], -8=not given since none of the partial uncertainties is given
Column 43: rms-based uncertainty of water vapor total vertical column amount [moles per square meter], -1=cross section is zero in this wavelength range, -3=spectral fitting was done, but no rms-based uncertainty could be retrieved, -9=spectral fitting not successful
Column 44: Water vapor effective temperature [K]
Column 45: Independent uncertainty of water vapor effective temperature [K], -1=cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured-temperature uncertainty of it is based on f-code, -3=spectral fitting was done, but no independent uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -5=no independent uncertainty input was given, -9=spectral fitting not successful
Column 46: Structured uncertainty of water vapor effective temperature [K], -1=cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured-temperature uncertainty of it is based on f-code, -3=spectral fitting was done, but no structured uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -5=no independent uncertainty input was given, -7=not given since method MEAS was chosen, -9=spectral fitting not successful
Column 47: Common uncertainty of water vapor effective temperature [K], -1=cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured-temperature uncertainty of it is based on f-code, -3=spectral fitting was done, but no common uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -6=no common uncertainty input was given, -7=not given since method MEAS was chosen, -9=spectral fitting not successful
Column 48: Total uncertainty of water vapor effective temperature [K], -8=not given since none of the partial uncertainties is given
Column 49: rms-based uncertainty of water vapor effective temperature [K], -1=cross section is zero in this wavelength range, -2=no temperature fitting was requested and output for effective temperature and structured-temperature uncertainty of it is based on f-code, -3=spectral fitting was done, but no rms-based uncertainty could be retrieved, -4=temperature fitting was requested, but differential optical depth is too small to retrieve the temperature, -9=spectral fitting not successful
Column 50: Direct water vapor air mass factor
Column 51: Uncertainty of direct water vapor air mass factor, -7=uncertainty could not be retrieved since slant column uncertainties were missing
Column 52: Diffuse correction applied before fitting at effective fitting wavelength for water vapor [%], 0=no diffuse correction applied or fitting not successful, >0=measured diffuse correction, <0=(negative value of) calculated diffuse correction
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