Known time desc » History » Version 21
Anonymous, 08/07/2016 10:57 AM
| 1 | 1 | Anonymous | h1. Known time description |
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| 2 | 2 | Anonymous | |
| 3 | h2. Double Time ranges : date from 01/01/1970 to 01/01/2100 |
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| 4 | |||
| 5 | 4 | Anonymous | * seconds from 01/01/1970 00:00:00 : 0 to 4 102 488 000 |
| 6 | * milliseconds from 01/01/1970 00:00:00 : 0 to 4 102 488 000 000 (ambiguity for the first 48days of 1970 with previous time format) |
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| 7 | * seconds from 01/01/0000 00:00:00 : 62 168 472 000 to 66 270 960 000 (no ambiguity) |
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| 8 | * milliseconds from 01/01/0000 00:00:00 : 62 168 472 000 000 to 66 270 960 000 000 (no ambiguity) |
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| 9 | 14 | Anonymous | * seconds from 01/01/2000 00:00:00 : - 946 728 000 to 3 155 760 000 (TT2000) |
| 10 | * milliseconds from 01/01/2000 00:00:00 : - 946 728 000 000 to 3 155 760 000 000 (ambiguity with TT2000 in seconds?) |
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| 11 | 5 | Anonymous | |
| 12 | |||
| 13 | h2. Known time description |
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| 14 | 1 | Anonymous | |
| 15 | |||
| 16 | 14 | Anonymous | |_.Mission Name |_.time var name |_. units |_.DEPEND |_.LABLAXIS|_.FIELDNAM |_.CATDESC |_.Type |_.VIRTUAL|_.nb of records|_.VAR_NOTES| |
| 17 | |Cluster FGM |time_tags__CDFNAME |ms |0 |UT |Universal Time |Interval centred time tag |CDF_EPOCH | |normal |field missing| |
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| 18 | |Cluster HIA |time_tags__CDFNAME |ms |0 |UT |Center Time |Interval centred time tag |CDF_EPOCH | |normal |field missing| |
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| 19 | |||||||||||| |
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| 20 | |Themis Efi,SCM |VARNAME_time |sec |TIME |UT |Same as time var name|UTC, in seconds sinc 01-Jan-1970 00:00:00|CDF_DOUBLE | |normal |Unleaped seconds| |
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| 21 | |Themis Efi,SCM |VARNAME_epoch |field missing|0 |UT |Same as time var name|Unrelated |CDF_EPOCH |true |0 |field missing| |
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| 22 | |Themis Efi,SCM |VARNAME_dot0_epoch0|msec |EPOCH0 |UT |Same as time var name|EPOCH of THEMIS time base |CDF_EPOCH | |1 |EPOCH of 01-Jan-1970 00:00:00| |
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| 23 | |Themis Esa |VARNAME_time |sec |TIME |UT |Same as time var name|UTC, in seconds sinc 01-Jan-1970 00:00:00|CDF_REAL8 | |normal |Unleaped seconds| |
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| 24 | |Themis Esa |VARNAME_epoch |field missing|0 |UT |Same as time var name|Unrelated |CDF_EPOCH |true |0 |field missing| |
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| 25 | |Themis Esa |VARNAME_dot0_epoch0|msec |EPOCH0 |UT |Same as time var name|EPOCH of THEMIS time base |CDF_EPOCH | |1 |EPOCH of 01-Jan-1970 00:00:00| |
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| 26 | |Themis Peer |VARNAME_time |sec |TIME |UT |Same as time var name|UTC, in seconds sinc 01-Jan-1970 00:00:00|CDF_DOUBLE | |> data |Unleaped seconds| |
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| 27 | |Themis Peer |VARNAME_epoch |field missing |0 |UT |Same as time var name|VARNAME |CDF_EPOCH | |normal |field missing| |
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| 28 | |Themis Peer |VARNAME_epoch0 |msec |EPOCH0 |timebase |Same as time var name|EPOCH of THEMIS time base |CDF_EPOCH | |1 |EPOCH of 01-Jan-1970 00:00:00| |
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| 29 | 15 | Anonymous | |||||||||||| |
| 30 | 14 | Anonymous | |MMS fpi |Epoch (absent, Epoch_minus_var is present) |s |0 |Field missing | VARNAME|VARNAME |CDF_UINT1 | |1 |VARNAME| |
| 31 | |MMS scm |epoch_timetag |ns |0 |VARNAME |Same as time var name|Packet time time |CDF_TIME_TT2000| |normal |field missing| |
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| 32 | |MMS scm |Epoch (other var time) |ns |0 |VARNAME |Same as time var name|Time |CDF_TIME_TT2000| |normal |field missing| |
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| 33 | 16 | Anonymous | |||||||||||| |
| 34 | |ACE mfi |Epoch |ms |0 |VARNAME |Time |Time ,beginning of interval |CDF_EPOCH | |normal |field missing| |
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| 35 | |||||||||||| |
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| 36 | |Helios nessmag |Epoch |ms |0 |field missing |Epoch |Default Time |CDF_EPOCH | |normal |field missing| |
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| 37 | |||||||||||| |
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| 38 | 17 | Anonymous | |Ulysses hft |Epoch |ms |0 |Time |Epoch |Time in NSSDC Epoch format |CDF_EPOCH | |normal |field missing| |
| 39 | 18 | Anonymous | |||||||||||| |
| 40 | |SOHO cst |Epoch |ms |0 |Epoch |Time Line |Time |CDF_EPOCH | |normal |field missing| |
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| 41 | |||
| 42 | |||
| 43 | h2. Algorithm Proposition |
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| 44 | |||
| 45 | VariableThatNeedsTime |
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| 46 | depend0 = get(VariableThatNeedsTime.DEPEND_0 variable) |
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| 47 | |||
| 48 | if(depend0.nbOfRec == VariableThatNeedsTime.nbOfRec) |
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| 49 | 21 | Anonymous | * test depend0.firstValue for different double range mentionned above (this part might include CDF_TYPE for TT2000) |
| 50 | * if(ambiguity) |
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| 51 | ** look at depend0.units |
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| 52 | ** if field is missing, look at VariableThatNeedsTime.depend_epoch0.units field |
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| 53 | 18 | Anonymous | |
| 54 | else |
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| 55 | dependTime = get(VariableThatNeedsTime.DEPEND_TIME variable) |
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| 56 | if(dependTime.nbOfRec == VariableThatNeedsTime.nbOfRec) |
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| 57 | 21 | Anonymous | * test dependTime.firstValue for different double range mentionned above (this part might include CDF_TYPE for TT2000) |
| 58 | * if(ambiguity) |
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| 59 | ** look at dependTime.units |