PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2000-04-24 NOTE = "Description of contents of CALIB directory" END_OBJECT = TEXT END The CALIB directory contains calibration data used in preparing files for this archive volume. Each calibration file is either a PDS TABLE object or a PDS SPECTRUM object (a subset of the TABLE object). Each is an ASCII file with fixed-length records and is accompanied by a detached PDS label which completely describes both its format and content. Records in each file are delimited by an ASCII carriage-return line-feed pair in the last two positions. The files in this directory are listed below. All detached PDS labels have the same name as the respective data file but use the LBL suffix; labels are not listed separately here. Files are listed in the approximate order they would be used in processing/calibrating the data. CALINFO.TXT A brief description of the contents of the CALIB directory (this file). CALINFO.TXT is a PDS TEXT object with an attached PDS label. FL14SR01.SPC The end-to-end output RCP power spectrum at DSS 14 with noise (only) as input. This spectrum was used to equalize the spectral response of the RCP data. The spectrum has 256 frequency bins and was based on 15 million independent noise samples. FL14SL01.SPC The end-to-end output LCP power spectrum at DSS 14 with noise (only) as input. This spectrum was used to equalize the spectral response of the LCP data. The spectrum has 256 frequency bins and was based on 15 million independent noise samples. FL14SR02.SPC Alternative end-to-end output RCP power spectrum at DSS 14 with noise (only) as input. This spectrum was NOT used to equalize the spectral response of the RCP data in this analysis. The spectrum has 128 frequency bins and was based on 42 million independent noise samples. FL14SL02.SPC Alternative end-to-end output LCP power spectrum at DSS 14 with noise (only) as input. This spectrum was NOT used to equalize the spectral response of the LCP data in this analysis. The spectrum has 128 frequency bins and was based on 42 million independent noise samples. FL43SR01.SPC First end-to-end output RCP power spectrum at DSS 43 with noise (only) as input. No DSS 43 data were included in this archive. See detached label for filter details. FL43SL01.SPC First end-to-end output LCP power spectrum at DSS 43 with noise (only) as input. No DSS 43 data were included in this archive. See detached label for filter details. FL43SR02.SPC Alternate end-to-end output RCP power spectrum at DSS 43 with noise (only) as input. No DSS 43 data were included in this archive. See detached label for filter details. FL43SL02.SPC Alternate end-to-end output LCP power spectrum at DSS 43 with noise (only) as input. No DSS 43 data were included in this archive. See detached label for filter details. TABLE2.TAB Table 2 from Simpson and Tyler (J. Geophys. Res., 104, 3845-3862, 1999) summarizing system temperature calibrations for both RCP and LCP channels. These results were used to ensure that G099C141.TAB and G099C143.TAB (below) were defined with respect to the same absolute reference. G099C141.TAB Table of coefficients giving gain corrections applied to RCP samples. G099C143.TAB Table of coefficients giving gain corrections applied to LCP samples. STEERCF1.TAB Table of coefficients giving frequency of the RCP carrier signal after equalization and gain correction. Multiplying the data by a sinusoid at this frequency would move the carrier to DC (and to double this frequency). Multiplying the data by a sinusoid at this frequency minus 12500 Hz would shift the carrier to the center of the passband (12500 Hz). The same set of coefficients was used to translate the residual LCP carrier to 12500 Hz. DF2SCM.TAB Table of coefficients giving frequency of a hypothetical echo from the lunar South Pole assuming the carrier has been centered at 12500 Hz. Multiplying the data samples by a second sinusoid at this frequency minus 12500 Hz would shift the South Pole echo to 12500 Hz. The same set of coefficients was used to shift both the RCP and LCP signals.