SIMPLE  =                    T / Standard FITS format                           BITPIX  =                    8 / Character information                          NAXIS   =                    0 / No image data array present                    EXTEND  =                    T / Standard extensions                            OBJECT  = 'P/HALLEY'           / Object of investigation                        FILE-NUM=               089001 / File number                                    DATE-OBS= '13/03/86'           / Date of mid-observation                        TIME-OBS= '.98     '           / Mid-time of observation                        LONG-OBS= '999/99/99'          / Longitude of observatory                       LAT-OBS = '+99/99/99'          / Latitude of observatory                        DATE-REL= '01/07/90'           / Date of release                                DISCIPLN= 'GIOTTO/DID'         / Giotto DIDSY experiment data                   SYSTEM  = '05009989'           / Observation system                             OBSERVER= 'MCDONNELL,J.A.M/ET AL.' / Giotto DIDSY team (as A&A, 1987)           SUBMITTR= 'GREEN,S.F/PANKIEWICZ,G.S' / Submitters to IHW                        SPEC-EVT=                    F / No special events inserted or deleted                                                                                          DAT-FORM= 'ASCII   '           / Data in tabular ASCII form                     ORIGIN  = 'UNIV.KENT,U.K'      / Site at which tape was written                 DATE    = '08/05/90'           / Date tape was written                          COMMENT  GIOTTO DUST IMPACT DETECTION SYSTEM (DIDSY) DATA                       COMMENT  UNIT FOR SPACE SCIENCES, UNIVERSITY OF KENT,                           COMMENT  CANTERBURY, KENT, CT2 7NR.                                             COMMENT  FILE 089 001                                                           COMMENT  IMPACT PLASMA AND MOMENTUM SUB-SYSTEM (MOMENTUM)                       COMMENT  IPM-M (DID1-M)                                                         COMMENT                                                                         COMMENT  ADD. OBS. ALEXANDER,W.M/BURTON,W.M/BUSSOLETTI,E/EVANS,G.C/             COMMENT  ADD. OBS. EVANS,S.T/FIRTH,J.G/GRARD,R.J.L/GREEN,S.F/GRUN,E/            COMMENT  ADD. OBS. HANNER,M.S/HUGHES,D.W/IGENBERGS,E/KISSEL,J/                  COMMENT  ADD. OBS. KUCZERA,H/LINDBLAD,B.A/LANGEVIN,Y/MANDEVILLE,J.C/            COMMENT  ADD. OBS. NAPPO,S/PANKIEWICZ,G.S/PERRY,C.H/SCHWEHM,G.H/                COMMENT  ADD. OBS. SEKANINA,Z/STEVENSON,T.J/TURNER,R.F/WEISHAUPT,U/             COMMENT  ADD. OBS. WALLIS,M.K/ZARNECKI,J.C                                      END                                                                                                                                                             XTENSION= 'TABLE   '           / Table extension                                BITPIX  =                    8 / Character                                      NAXIS   =                    2 / 2-D matrix                                     NAXIS1  =                  120 / Number of characters per row                   NAXIS2  =                 3424 / Number of rows                                 PCOUNT  =                    0 / No random parameters                           GCOUNT  =                    1 / Only one group                                 TFIELDS =                   17 / Number of fields per row                       EXTNAME = '1 DIDSY IPM-M '     / Name of file                                   EXTVER  =                    4 / Extension version number                                                                                                       TTYPE1  = 'HR      '           / Ground received time (hr)                      TBCOL1  =                    1 / Start in column 1                              TFORM1  = 'I2      '           / Integer nn                                     TUNIT1  = 'HOUR    '           / Hours                                                                                                                          TTYPE2  = 'MIN     '           / Ground received time (min)                     TBCOL2  =                    4 / Start in column 4                              TFORM2  = 'I2      '           / Integer nn                                     TUNIT2  = 'MIN     '           / Minutes                                                                                                                        TTYPE3  = 'SEC     '           / Ground received time (sec)                     TBCOL3  =                    7 / Start in column 7                              TFORM3  = 'F4.1    '           / Real xx.x                                      TUNIT3  = 'SEC     '           / Seconds                                                                                                                        TTYPE4  = 'DISTANCE'           / Cometocentric distance                         TBCOL4  =                   12 / Start in column 12                             TFORM4  = 'I6      '           / Integer nnnnnn                                 TUNIT4  = 'KM      '           / Kilometres                                                                                                                     TTYPE5  = 'FLAGS   '           / Data processing flags - see history            TBCOL5  =                   19 / Start in column 19                             TFORM5  = 'A5      '           / Character aaaaa                                                                                                                TTYPE6  = 'IPM-M  1 COUNTS'    / IPM-M  bin1 dead-time corrected counts         TBCOL6  =                   25 / Start in column  25                            TFORM6  = 'E9.3    '           / Format                                         TNULL6  = '-.900E+01'          / Null value                                                                                                                     TTYPE7  = 'IPM-M  1 FLUX'      / Derived particle flux                          TBCOL7  =                   35 / Start in column  35                            TFORM7  = 'E9.3    '           / Format                                         TUNIT7  = 'M-2.SEC-1'          / Per square metre per second                    TNULL7  = '-.900E+01'          / Null value                                                                                                                     TTYPE8  = 'IPM-M  1 ERROR'     / Statistical error from original counts         TBCOL8  =                   45 / Start in column  45                            TFORM8  = 'I3      '           / Format                                         TUNIT8  = '%       '           / Percentage                                     TNULL8  = '-9      '           / Null value                                                                                                                     TTYPE9  = 'IPM-M  2 COUNTS'    / IPM-M  bin2 dead-time corrected counts         TBCOL9  =                   49 / Start in column  49                            TFORM9  = 'E9.3    '           / Format                                         TNULL9  = '-.900E+01'          / Null value                                                                                                                     TTYPE10 = 'IPM-M  2 FLUX'      / Derived particle flux                          TBCOL10 =                   59 / Start in column  59                            TFORM10 = 'E9.3    '           / Format                                         TUNIT10 = 'M-2.SEC-1'          / Per square metre per second                    TNULL10 = '-.900E+01'          / Null value                                                                                                                     TTYPE11 = 'IPM-M  2 ERROR'     / Statistical error from original counts         TBCOL11 =                   69 / Start in column  69                            TFORM11 = 'I3      '           / Format                                         TUNIT11 = '%       '           / Percentage                                     TNULL11 = '-9      '           / Null value                                                                                                                     TTYPE12 = 'IPM-M  3 COUNTS'    / IPM-M  bin3 dead-time corrected counts         TBCOL12 =                   73 / Start in column  73                            TFORM12 = 'E9.3    '           / Format                                         TNULL12 = '-.900E+01'          / Null value                                                                                                                     TTYPE13 = 'IPM-M  3 FLUX'      / Derived particle flux                          TBCOL13 =                   83 / Start in column  83                            TFORM13 = 'E9.3    '           / Format                                         TUNIT13 = 'M-2.SEC-1'          / Per square metre per second                    TNULL13 = '-.900E+01'          / Null value                                                                                                                     TTYPE14 = 'IPM-M  3 ERROR'     / Statistical error from original counts         TBCOL14 =                   93 / Start in column  93                            TFORM14 = 'I3      '           / Format                                         TUNIT14 = '%       '           / Percentage                                     TNULL14 = '-9      '           / Null value                                                                                                                     TTYPE15 = 'IPM-M  4 COUNTS'    / IPM-M  bin4 dead-time corrected counts         TBCOL15 =                   97 / Start in column  97                            TFORM15 = 'E9.3    '           / Format                                         TNULL15 = '-.900E+01'          / Null value                                                                                                                     TTYPE16 = 'IPM-M  4 FLUX'      / Derived particle flux                          TBCOL16 =                  107 / Start in column 107                            TFORM16 = 'E9.3    '           / Format                                         TUNIT16 = 'M-2.SEC-1'          / Per square metre per second                    TNULL16 = '-.900E+01'          / Null value                                                                                                                     TTYPE17 = 'IPM-M  4 ERROR'     / Statistical error from original counts         TBCOL17 =                  117 / Start in column 117                            TFORM17 = 'I3      '           / Format                                         TUNIT17 = '%       '           / Percentage                                     TNULL17 = '-9      '           / Null value                                                                                                                     COMMENT  MASS THRESHOLDS FOR POST-ENCOUNTER DATA (T > 00:11:02). PRE-ENCOUNTER  COMMENT  DATA ARE AFFECTED BY NON-RETRACTION OF INSTRUMENT COVER. UNKNOWN HIGHERCOMMENT  MASS THRESHOLDS APPLICABLE BEFORE T APPROX 00:10 FOLLOWED BY POSSIBLE  COMMENT  COVER EROSION OR RETRACTION                                            COMMENT  QUOTED FLUXES ARE CUMULATIVE (FOR ALL MASSES > THRESHOLD B)            COMMENT  B) EFFECTIVE THRESHOLD BASED ON MEAN SENSITIVITY OF SENSORS            COMMENT  C) MOST PROBABLE MASS FOR DIFFERENTIAL DATA                            COMMENT    CHANNEL         B          C                                         COMMENT     1          4.0E-13     5.2E-13         (KG)                         COMMENT     2          1.0E-12     1.4E-12                                      COMMENT     3          5.0E-12     7.0E-12                                      COMMENT     4          4.0E-11     8.6E-12                                      COMMENT  EFFECTIVE AREA OF SENSOR = 0.0119 M**2 FOR ALL CHANNELS                COMMENT                                                                         HISTORY  PROCESSING FLAGS RELATE TO PRODUCTION OF COUNTS FROM ORIGINAL MERGED   HISTORY  DATA TAPES.                                                            HISTORY  DUE TO LOSS OF TELEMETRY CERTAIN DIDSY DATA BLOCKS WERE INCOMPLETE.    HISTORY  FLAGS INDICATE PROCESSING TO EXTRACT THE USEFUL DATA FROM THESE BLOCKS.HISTORY  EACH OF FIVE FLAGS ARE SET TO * IF:                                    HISTORY    1) INCOMPLETE DATA BLOCK                                             HISTORY    2) NON-CONSECUTIVE BLOCK NUMBER IN DATA TRAIN                        HISTORY    3) BLOCK TIMING INCONSISTENT                                         HISTORY    4) FRAME COUNT INCONSISTENT                                          HISTORY    5) UNUSUAL FORMAT NUMBER IN FRAME INDICATING TELEMETRY BREAK         END