PVO Ion Mass Spectrometer low-resolution data are stored in single-orbit ASCII files. These files can be converted to UADS-compliant file structures by concatenation of the UADS_HDR.TXT file with an individual data file (header first!). All of the data files have the same internal structure, which is described by the single format file OIMSDATA.FMT. File structure characteristics which may vary from file to file (# of records, start/stop time, etc.) are described in the individual PDS label files. /-------------------------\ | D A T A | \-------------------------/ Columns in all data files: ===================================================== name type description ----------------------------------------------------- PVO TIME int Date and time in format YYDOY FSEC, where YY is the year, DOY is the day-of-year & FSEC is the decimal second-of-day ORBIT integer PVO orbit number PERISECS float Seconds after periapsis (negative before periapsis) DEN_1 integer Number density of 1 AMU particles DEN_2 integer Number density of 2 AMU particles DEN_4 integer Number density of 4 AMU particles DEN_8 integer Number density of 8 AMU particles DEN_12 integer Number density of 12 AMU particles DEN_14 integer Number density of 14 AMU particles DEN_16 integer Number density of 16 AMU particles DEN_18 integer Number density of 18 AMU particles DEN_28 integer Number density of 28 AMU particles DEN_30 integer Number density of 30 AMU particles DEN_32 integer Number density of 32 AMU particles DEN_44 integer Number density of 44 AMU particles Any number density data item whose value equals -999999 is a missing data value. Missing data values in the seconds-after-periapsis column are indicated by the value -9999.999. Data Files (.TAB extension) The high-resolution data files on this disk are ASCII table files, each having 15 columns and record length 130 bytes. Information about the individual files (number of records, start and stop times, etc.) can be obtained from the PDS label file accompanying each *.TAB file. This label file has the same filename as the data file but with .TAB replaced by .LBL. List of data files: ============================================================================ Name Records Cols Len Start Stop ---------------------------------------------------------------------------- ORB1100 149 15 130 1981-12-10T01:28:57.408Z 1981-12-10T01:58:45.408Z ORB1101 174 15 130 1981-12-12T01:27:23.605Z 1981-12-12T02:01:59.605Z ORB1102 140 15 130 1981-12-12T01:27:01.303Z 1981-12-12T01:54:49.303Z ORB1103 52 15 130 1981-12-14T01:39:02.595Z 1981-12-14T01:49:14.595Z ORB1104 140 15 130 1981-12-14T01:27:39.273Z 1981-12-14T01:55:27.273Z ORB1105 118 15 130 1981-12-15T01:29:27.404Z 1981-12-15T01:53:03.404Z ORB1106 116 15 130 1981-12-16T01:30:14.973Z 1981-12-16T01:53:14.973Z ORB1107 126 15 130 1981-12-18T01:28:49.966Z 1981-12-18T01:54:01.966Z ORB1108 121 15 130 1981-12-18T01:27:48.373Z 1981-12-18T01:51:48.373Z ORB1109 215 15 130 1981-12-20T01:26:58.184Z 1981-12-20T02:09:46.184Z ORB1110 124 15 130 1981-12-20T01:26:55.390Z 1981-12-20T01:51:31.390Z ORB1111 141 15 130 1981-12-21T01:27:03.986Z 1981-12-21T01:55:03.986Z ORB1112 182 15 130 1981-12-22T01:27:11.969Z 1981-12-22T02:03:23.969Z ORB1113 196 15 130 1981-12-24T01:26:43.336Z 1981-12-24T02:05:43.336Z ORB1114 115 15 130 1981-12-24T01:26:50.089Z 1981-12-24T01:52:26.089Z ORB1115 141 15 130 1981-12-26T01:26:32.227Z 1981-12-26T01:54:32.227Z ORB1116 147 15 130 1981-12-26T01:27:13.757Z 1981-12-26T01:56:25.757Z ORB1117 120 15 130 1981-12-28T01:26:18.683Z 1981-12-28T01:50:06.683Z ORB1118 28 15 130 1981-12-28T01:26:10.141Z 1981-12-28T01:48:22.141Z ORB1119 170 15 130 1981-12-29T01:26:01.786Z 1981-12-29T01:59:49.786Z ORB1121 3 15 130 1982-01-01T01:30:43.717Z 1982-01-01T01:40:31.717Z ORB1122 81 15 130 1982-01-02T01:25:33.826Z 1982-01-02T01:41:33.826Z ORB1123 84 15 130 1982-01-02T01:25:23.279Z 1982-01-02T01:51:47.279Z ORB1125 210 15 130 1982-01-04T01:25:25.722Z 1982-01-04T02:07:13.722Z ORB1126 105 15 130 1982-01-06T01:24:49.800Z 1982-01-06T01:45:37.800Z ORB1128 109 15 130 1982-01-08T01:24:47.645Z 1982-01-08T01:46:23.645Z ORB1129 59 15 130 1982-01-08T01:36:47.484Z 1982-01-08T01:48:23.484Z ORB1130 122 15 130 1982-01-10T01:23:57.951Z 1982-01-10T01:48:09.951Z ORB1131 107 15 130 1982-01-10T01:24:56.086Z 1982-01-10T01:46:08.086Z ORB1132 99 15 130 1982-01-12T01:23:41.917Z 1982-01-12T01:43:17.917Z ORB1133 116 15 130 1982-01-12T01:24:39.477Z 1982-01-12T01:47:39.477Z ORB1134 165 15 130 1982-01-14T01:23:12.797Z 1982-01-14T01:58:12.797Z ORB1135 96 15 130 1982-01-14T01:23:57.911Z 1982-01-14T01:43:09.911Z ORB1136 197 15 130 1982-01-15T01:22:54.852Z 1982-01-15T02:02:06.852Z ORB1137 100 15 130 1982-01-16T01:22:27.654Z 1982-01-16T01:43:27.654Z ORB1138 124 15 130 1982-01-18T01:22:00.351Z 1982-01-18T01:46:36.351Z ORB1139 143 15 130 1982-01-18T01:21:44.980Z 1982-01-18T01:50:44.980Z ORB1140 203 15 130 1982-01-20T01:21:29.575Z 1982-01-20T02:01:53.575Z ORB1141 237 15 130 1982-01-20T01:22:38.171Z 1982-01-20T02:09:50.171Z ORB1142 118 15 130 1982-01-22T01:21:10.805Z 1982-01-22T01:44:46.805Z ORB1143 144 15 130 1982-01-22T01:20:54.413Z 1982-01-22T01:49:30.413Z ORB1144 111 15 130 1982-01-23T01:20:27.300Z 1982-01-23T01:44:03.300Z ORB1145 221 15 130 1982-01-24T01:20:48.328Z 1982-01-24T02:05:00.328Z ORB1146 142 15 130 1982-01-25T01:19:57.533Z 1982-01-25T01:48:21.533Z ORB1147 114 15 130 1982-01-26T01:20:06.946Z 1982-01-26T01:42:42.946Z ORB1148 214 15 130 1982-01-27T01:19:28.603Z 1982-01-27T02:02:04.603Z ORB1149 121 15 130 1982-01-28T01:20:14.540Z 1982-01-28T01:44:14.540Z ORB1151 160 15 130 1982-01-30T01:18:47.359Z 1982-01-30T01:50:35.359Z ORB1152 180 15 130 1982-02-01T01:19:58.303Z 1982-02-01T02:02:22.303Z ORB1153 179 15 130 1982-02-01T01:18:21.640Z 1982-02-01T01:53:57.640Z ORB1154 237 15 130 1982-02-02T01:18:09.398Z 1982-02-02T02:05:21.398Z ORB1155 188 15 130 1982-02-03T01:17:57.579Z 1982-02-03T01:56:21.579Z ORB1156 224 15 130 1982-02-04T01:17:58.248Z 1982-02-04T02:02:34.248Z ORB1157 110 15 130 1982-02-05T01:17:35.410Z 1982-02-05T01:40:11.410Z ORB1158 225 15 130 1982-02-06T01:17:49.083Z 1982-02-06T02:02:37.083Z ORB1159 157 15 130 1982-02-07T01:17:27.288Z 1982-02-07T01:48:39.288Z ORB1160 177 15 130 1982-02-08T01:17:18.039Z 1982-02-08T01:53:54.039Z ORB1161 138 15 130 1982-02-09T01:16:57.349Z 1982-02-09T01:48:09.349Z ORB1162 35 15 130 1982-02-10T01:16:49.228Z 1982-02-10T01:23:37.228Z ORB1163 201 15 130 1982-02-11T01:16:41.681Z 1982-02-11T01:56:53.681Z ORB1164 180 15 130 1982-02-12T01:16:58.726Z 1982-02-12T01:52:46.726Z ORB1165 151 15 130 1982-02-13T01:16:28.372Z 1982-02-13T01:47:16.372Z ORB1166 225 15 130 1982-02-14T01:16:58.624Z 1982-02-14T02:01:46.624Z ORB1167 135 15 130 1982-02-15T01:17:29.484Z 1982-02-15T01:44:17.484Z ORB1168 204 15 130 1982-02-16T01:16:12.956Z 1982-02-16T01:58:36.956Z ORB1169 192 15 130 1982-02-17T01:16:20.926Z 1982-02-17T01:54:32.926Z ORB1170 166 15 130 1982-02-18T01:16:17.601Z 1982-02-18T01:51:41.601Z ORB1171 217 15 130 1982-02-19T01:16:14.879Z 1982-02-19T01:59:50.879Z ORB1172 119 15 130 1982-02-20T01:16:00.754Z 1982-02-20T01:39:48.754Z ORB1173 224 15 130 1982-02-21T01:16:11.218Z 1982-02-21T02:00:47.218Z ORB1175 14 15 130 1982-02-23T01:16:21.869Z 1982-02-23T01:21:45.869Z ORB1176 166 15 130 1982-02-24T01:16:09.906Z 1982-02-24T01:50:21.906Z ORB1177 233 15 130 1982-02-25T01:16:22.592Z 1982-02-25T02:03:10.592Z ORB1178 91 15 130 1982-02-26T01:16:23.798Z 1982-02-26T01:35:47.798Z ORB1179 190 15 130 1982-02-27T01:16:13.504Z 1982-02-27T01:54:13.504Z ORB1180 154 15 130 1982-02-28T01:16:51.690Z 1982-02-28T01:54:03.690Z ORB1181 182 15 130 1982-03-01T01:22:42.334Z 1982-03-01T01:58:54.334Z ORB1182 229 15 130 1982-03-02T01:16:45.411Z 1982-03-02T02:02:21.411Z ORB1183 228 15 130 1982-03-03T01:19:00.898Z 1982-03-03T02:04:24.898Z ORB1184 192 15 130 1982-03-04T01:17:15.887Z 1982-03-04T01:56:51.887Z ORB1185 240 15 130 1982-03-05T01:16:55.610Z 1982-03-05T02:04:43.610Z ORB1186 233 15 130 1982-03-06T01:16:59.660Z 1982-03-06T02:03:23.660Z ORB1187 235 15 130 1982-03-07T01:16:40.007Z 1982-03-07T02:03:40.007Z ORB1188 149 15 130 1982-03-08T01:18:08.620Z 1982-03-08T01:49:08.620Z ORB1189 84 15 130 1982-03-09T01:21:25.467Z 1982-03-09T01:54:25.467Z ORB1190 174 15 130 1982-03-10T01:21:18.453Z 1982-03-10T01:55:54.453Z ORB1191 194 15 130 1982-03-11T01:23:59.662Z 1982-03-11T02:02:35.662Z ORB1192 210 15 130 1982-03-12T01:18:05.007Z 1982-03-12T01:59:53.007Z ORB1193 176 15 130 1982-03-13T01:21:46.456Z 1982-03-13T01:57:10.456Z ORB1194 169 15 130 1982-03-14T01:18:27.973Z 1982-03-14T01:57:15.973Z ORB1195 13 15 130 1982-03-15T01:19:09.526Z 1982-03-15T01:34:09.526Z ORB1196 135 15 130 1982-03-16T01:26:39.080Z 1982-03-16T01:53:39.080Z ORB1197 161 15 130 1982-03-17T01:19:20.575Z 1982-03-17T01:54:20.575Z ORB1198 180 15 130 1982-03-18T01:19:26.031Z 1982-03-18T01:55:38.031Z ORB1199 137 15 130 1982-03-19T01:18:07.387Z 1982-03-19T01:54:31.387Z Catalog Files (.CAT extension) Catalog data, which includes instrument, dataset, mission and spacecraft descriptions, can be found in the *.CAT files in the CATALOG directory on this disk.