CCSD3ZF0000100000001NJPL3IF0PDS200000001= SFDU_LABEL PDS_VERSION_ID = PDS3 RECORD_TYPE = FIXED_LENGTH RECORD_BYTES = 76 FILE_RECORDS = 2092 ^TABLE = "SP200001.TAB" DATA_SET_ID = "VEGA1-C-SP2-3-RDR-HALLEY-V1.0" TARGET_NAME = "HALLEY" OBSERVATION_ID = "UNK" START_TIME = 1985-03-06T06:38:34 STOP_TIME = 1985-03-06T07:28:03 DESCRIPTION = "The SP-2 experiment on Vega spacecraft was intended for studying the spatial and mass distributions of dust particles in the cometary coma over the mass range 1. x 10**-16 to 1. x 10**-6 g. Covering such a broad mass range was made possible by using sensors of two types, namely, impact plasma and acoustic. For detailed instrument description and discussion of results obtained see: Balebanov, V.M., Skuridin, G.A., Vorontsova, E.V., Bassolo, V.S.(eds.): 1985, Venus-Halley Mission, Louis-Jean, Gap Mazets, E.P., Aptekar, R.L., Golenetskii, S.V., Guryan, Y.A., Dyachkov, A.V., Ilyinskii, V.N., Panov, V.N., Petrov, G.G., Savvin, A.V., Sagdeev, R.Z., Sokolov, I.A., Khavenson, N.G., Shapiro, V.D., Shevchenko, V.I., 1986, Nature 321, 276 Mazets, E.P., Sagdeev, R.Z., Aptekar, R.L., Golenetskii, S.V., Guryan, Y.A., Dyachkov, A.V., Ilyinskii, V.N., Panov, V.N., Petrov, G.G., Savvin, A.V., Sokolov, I.A., Frederiks, D.D., Khavenson, N.G., Shapiro, V.D., Shevchenko, V.I., 1987, Astron. Astrophys. 187, 699-704 For the acoustic sensors, dead time corrections were introduced at channel count rate N(>m) > 50/s. For the fast impact plasma sensors such corrections were not needed. Records containing no useful information are skipped and the fields containing unreliable data are filled by '-99'." OBJECT = TABLE NAME = "VEGA1 SP2" INTERCHANGE_FORMAT = ASCII ROWS = 2092 ROW_BYTES = 76 COLUMNS = 18 DESCRIPTION = "Below are the mass threshold values, in grams, for each column in this table: Column Data Mass type Threshold --- --------- 1 time 2 Plasma N( > 6.e-16 ) 3 Plasma N( > 6.e-15 ) 4 Plasma N( > 6.e-14 ) 5 Plasma N( > 6.e-13 ) 6 Plasma N( > 6.e-12 ) 7 Acoustic N( > 1.5e-11 ) 8 Acoustic N( > 4.1e-11 ) 9 Acoustic N( > 1.2e-10 ) 10 Acoustic N( > 3.3e-10 ) 11 Acoustic N( > 9.2e-10 ) 12 Acoustic N( > 2.6e-9 ) 13 Acoustic N( > 7.3e-9 ) 14 Acoustic N( > 2.1e-8 ) 15 Acoustic N( > 5.8e-8 ) 16 Acoustic N( > 1.7e-7 ) 17 Acoustic N( > 4.7e-7 ) 18 Acoustic N( > 1.3e-6 ) " OBJECT = COLUMN NAME = TIME DATA_TYPE = ASCII_INTEGER START_BYTE = 1 BYTES = 5 FORMAT = "I5" UNIT = "SECONDS" DESCRIPTION = "Time of the measurement. Time 0 is 04:12:38 UT" END_OBJECT OBJECT = COLUMN NAME = PLASMA_CHANNEL_1_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 6 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 6. x 10**-16 G" END_OBJECT OBJECT = COLUMN NAME = PLASMA_CHANNEL_2_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 10 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 6. x 10**-15 G" END_OBJECT OBJECT = COLUMN NAME = PLASMA_CHANNEL_3_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 14 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 6. x 10**-14 G" END_OBJECT OBJECT = COLUMN NAME = PLASMA_CHANNEL_4_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 18 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 6. x 10**-13 G" END_OBJECT OBJECT = COLUMN NAME = PLASMA_CHANNEL_5_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 22 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 6. x 10**-12 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_6_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 26 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 1.5 x 10**-11 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_7_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 30 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 4.1 x 10**-11 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_8_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 34 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 1.2 x 10**-10 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_9_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 38 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 3.3 x 10**-10 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_10_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 42 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 9.2 x 10**-10 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_11_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 46 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 2.6 x 10**-09 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_13_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 50 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 7.3 x 10**-09 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_14_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 54 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 2.1 x 10**-08 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_15_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 58 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 5.8 x 10**-08 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_16_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 62 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 1.7 x 10**-07 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_17_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 66 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 4.7 x 10**-07 G" END_OBJECT OBJECT = COLUMN NAME = ACOUSTIC_CHANNEL_18_COUNT DATA_TYPE = ASCII_INTEGER START_BYTE = 70 BYTES = 4 FORMAT = "I4" INVALID = -99 DESCRIPTION = "MASS THRESHOLD > 1.3 x 10**06 G" END_OBJECT END_OBJECT = TABLE END