***** File MODE_TAB.DOC Mission: VEGA 1 Instrument: PUMA Submission: MPI Text Files Original Format The data for these files were received as a series of text files, each of which consisted of spectra of a single mode. Amplitude-triggered samples in the spectra were indicated by an "X" following the sample. Reformatting at SBN The following changes were made to the data: o A program was written to parse the headers and spectra and convert the ASCII values to binary form. Parameter values were ordered to facilitate comparison between the MPI and IKI submissions. o Flagged amplitudes, followed by an "X" in the text file, were indicated in the binary file as a additional byte set equal to 1 for flagged amplitudes, 0 otherwise. This is the same system used for the IKI submissions. o All spectra of the same mode were collected into a single, fixed- length table. o The original order of the spectra in the text files, as well as the order of the text files themselves, was preserved in the combined mode tables. This order was assumed to be chronological. Known Anomalies/Problems: o Little or no explanation was available for some of the parameters in the spectrum headers. This is indicated in the DESCRIPTION part of the PDS label for these datasets. o There are more spectra in this submission than IKI submissions. While there is a large amount of overlap between the IKI and MPI submissions, each contains spectra not included in the other. o It has not yet been possible to translate the times in this file, which are apparently in units of spacecraft clock time, to UT. o A number of mode 3 test spectra were found which contained an odd number of bytes in the spectrum. In this mode the number of bytes should be even, as each sample in the spectrum consists of a time sample byte and an amplitude sample byte. In these cases the single byte was assumed to be a time value and a null amplitude byte was appended to the spectrum. o Although the text files were each supposed to contain spectra of only a single mode, in one file of test mode 3 spectra a single mode 1 spectrum was found. It was not possible to unambiguously assign a location for this spectrum within the mode 1 table, so it was omitted from the binary mode tables. The text form of this spectrum follows: SEQ 3098 LLEN 211 SEN HHHHH FIS 1 TEL 4/1 ENR 3334 TIME 3341 TIL 14 TGC 6 TPOS 0 HV 3504 MO 7 CA 17 AC 2 TG 1 PM 2 COI 1/1 HVN 3596 NAC 20 NTG 3 NPM 17 TP 19 CC 78/ 5/ 0/191/197 IR 1 IL 0 I4 0 CCE 0 SPECTRUM NA 3 N0 65 MA 92 23 3 23 8X 25 6X 25 6X 26 6X 27 5X 31 3 33 8X 33 3X 33 7X 35 26X 35 4X 35 14X 37 3X 38 11X 40 7X 40 11X 41 4X 46 6X 47 4X 51 6X 52 8X 52 6X 58 12X 58 26X 59 6X 66 6 70 6X 71 6X 72 20X 73 3X 80 6X 80 6X 81 3X 83 18X 84 3X 92 3 94 9X 95 6X 99 6X 100 10X 101 4X 107 9X 108 6X 109 7X 110 4X 119 4 128 3 135 3 145 3 153 7X 154 5X 165 5 165 11X 167 6X 178 4 180 6X 181 6X 192 16X 192 6X 200 8X 202 6X 205 7X 206 5X 218 3 222 12X 222 7X 235 4 239 19X 239 9X 252 4 255 4 255 7X 255 6X 255 9X 255 6X 255 127 234 92X 32 99 7 0X 116 31 241 0X 0 0X 78 5X 0 63 199 67 86 120 180 87 0 8X