MDI Level 0 Data

Level 0 data, derived from decoding and decommutation of telemetry in the science data channels assigned to MDI, represent the original data sent by the onboard image processor. Along with the instrument and spacecraft housekeeping data and the spacecraft orbital and attitude data, they are the sole and definitive source from which data representing observables can be inferred.

For the most part, the Level 0 data records correspond to the processed observable proxies based on the camera images taken over designated intervals, typically 30 or 60 seconds, but longer for certain data products. Some represent individual camera frames, and some are memory and table dumps from the image processor.

Level 0 data are distinguished by a Data Product Code (DPC), a 32-bit number assigned to each unique image processing program. Individual records for a given DPC are distinguished by a reference time and in some cases a frame number as well. Over the course of the mission, records associated with each DPC were gathered together in a data series and collected into chunks of either 1 hour or 1 day, depending on the DPC and the associated telemetry stream from which they derived (high-rate or low-rate).

A total of 689 unique DPC's occur in originally processed Level 0 data*. Of these, however, 225 are invalid codes, caused by corruption of telemetry packets, and contain no actual data. The remaining 464 DPC's are distributed as follows:

The following DPC's exist in both daily and hourly data series:

With the exception of the series corresponding to DPC 00040000, for which there is no time overlap and no ambiguity, these are all series which were produced by ground processing of high-rate data to mimic the onboard processing to low-rate data products at times when the latter were unavailable. These were processed into hourly data sets and then gathered into daily data sets to be provided as input to the processing of low-rate data products, which were otherwise always daily data sets.


*There were an additional six series identified by codes other than valid DPC's:
  1. 42420f00_NN_01h
  2. 46451fc0_NN_01h
  3. 48470fc0_NN_01h
  4. cal_detune2_cal
  5. cal_detune2_obs
  6. cfffff98_NN_01h
Records for series 46451fc0_NN_01h and cfffff98_NN_01h exist only for the hour 2004.01.30_01:00 and are identical to those for the corresponding series without the "_NN" designation, at least as far as the metadata are concerned. They were apparently processed later (Mar 12 2004 rather than Feb 4, 2004). Likewise, records for series 42420f00_NN_01h and 48470fc0_NN_01h exist for only the three hours 2004.01.30_00:00 - 02:00 and were apparently processed later than their counterparts. They do differ, however, in the metadata, containing fewer images for the first and third hours. And some of the metadata differ for the middle hour as well.

The 34 group records in series cal_detune2_cal and cal_detune2_obs (17 in each) are a special case. They have series numbers in the range 3050160–3050219 and 3055193–3055199, which are much too large to correspond to mission hours. They would correspond to mission minutes in the time ranges 1998.10.20_04:00 – 04:59 and 1998.10.23_15:53 – 15:59. Like most other level 0 data series, they do not contain a DPC keyword explicitly, so it is not clear what prime DPC key they should be assigned to. However, like the Level 0 data series for DPC's 4???6007, they were apparently also the result of ground processing of Level 0 data, in these cases from DPC's 404d4400 (cal_detune2_cal) and 404e4400 (cal_detune2_obs). They do not represent independent instrument data.


Table 1: Valid Data Product Codes in MDI Level 0 Data

Camera Images Low-Rate Data Low-Rate Dumps High-Rate Data High-Rate Dumps Test and Fill
00000000
00014400
00022000
00032000
00032202
00032400
00034400
00034c00
00040000
00050000
00060000
00072000
00073000
00082000
03006001
03006003
03006004
03006005
03007001
03007003
03007005
03016005
03016006
03017005
03026007
03027005
033e6005
033e7005
033f6001
033f7003
03406001
03406003
03406004
03406005
03407001
03407003
03407005
03416005
03416006
03417005
03426007
03427005
037e6005
037e7005
05805001
05815001
05815002
05825002
05835002
05845003
05845004
05855005
05865005
05be5003
05bf5002
07007001
07017001
07017004
07037004
07047004
07047006
07057006
07057007
07067007
073e7004
073f7004
07407001
07417001
07417004
07437004
07447004
07447006
07457006
07457007
07467007
077e7004
07805001
07815001
07815002
07825002
07835002
07845002
07855002
07865002
07be5002
07bf5002
09410fc0
09420fc0
09430fc0
09440fc0
09460fc0
1180afb0
1180cf58
1181cf50
11bfcf50
1681cf50
1682cf50
1683cf50
1684cf50
1684ef20
1684ef30
1685df24
1685df28
1685df2c
1685df34
1685df38
1685df3c
1685df40
1685df44
1685df48
1685df4c
1685df50
1685df54
1685df58
1685df60
1685df68
1685df70
1685df74
1685df78
1685df7c
1685eef8
1685ef00
1685ef08
1685ef10
1685ef18
1685ef20
1686dee0
1686dee4
1686dee8
1686deec
1686def0
1686def4
1686def8
1686defc
1686df00
1686df04
1686df08
1686df0c
1686df10
1686df14
1686df18
1686df1c
1686df20
1686df24
1686df28
1686df2c
1686df30
1686df34
1686df38
1686df3c
1686df40
1686df44
1686df48
1686df4c
1686df50
1686df54
1686df58
1686df5c
1686df60
1686df64
1686df68
1686df6c
1686df70
1686df74
1686df78
1686df7c
16beef30
20000000
2000058c
200005b4
20010000
20020000
21000000
2e000000
40083e00
400c3100
40412400
40414400
40432400
40434c00
40440000
4044b000
40450000
4045b000
40460000
4046b000
40483000
40483240
40483a00
40483b00
40483b01
40483d00
40483d01
40483e00
40483f00
404b1fc0
404b2000
404b3000
404b3d00
404b3f00
404d4400
404e4400
404fc001
40502400
40512400
4052b000
40533f00
4054b000
42000fc0
42006007
42012000
42020fc0
42026007
423e0fc0
423f0fc0
42400fc0
42406007
424207e0
42420f00
42420f60
42420fc0
42426007
42470f00
42472040
42472d00
42474800
424807e0
42480f00
42480fc0
42486007
43c09001
43c09002
43c19001
43c27005
43c27105
43c27205
43c29001
43c29005
43c29105
43c29205
44012000
44023e00
44043e00
44483040
44483140
44483240
44483b00
44484800
46000fc0
46010fc0
46020fc0
46023000
46040fc0
46051fc0
46056007
46061fc0
46066007
463e0fc0
463f0fc0
46420fc0
46440fc0
464517e0
46451fc0
46456007
464817e0
46481fc0
46483000
46486007
47c19001
47c19002
47c29002
47c49002
47c57006
47c57007
47c57107
47c57207
47c59006
47c59007
47c59107
47c59207
47c67207
47c69207
48000fc0
48410fc0
48420fc0
48430fc0
48440fc0
48470f00
48470f60
48470fc0
48472000
48472040
48472d00
49410fc0
49422000
49430fc0
49432000
49440fc0
49450001
49450002
49450003
49450004
49450fc0
49460003
49460004
49460fc0
4a002000
4a012000
4a022e00
4a402000
4a442000
4a442a00
4a444800
4a452000
4a452a00
4a454800
4a472000
4a472a00
4a472d00
4a472d01
4a474800
4a482000
4a482040
4a482140
4a482240
4a482a00
4a482b00
4a484800
4a492d00
4a4a2000
4a4a2240
4a4a2a00
4a4a2b00
4a4a2d00
4a4a2d01
4a4a4800
4ac02800
4b002000
4b002e00
4b402000
4b412000
4b422000
4b432000
4b434800
4b452000
4b454800
4b462000
4b464800
4b472000
4b472b00
4b472d00
4b472d01
4b472f00
4b474800
4b492d00
4b4a0fc0
4b4a2000
4b4a2240
4b4a2b00
4b4a2b01
4b4a2d00
4b4a2d01
4b4a2f00
4b4a4800
4c000fc0
4c003000
4c05afc0
4c06afc0
4c400fc0
4c456007
4c45afc0
4c481fc0
4d483240
4d483e00
61001001
61002001
61002002
61003001
61003002
61003003
61003004
62000f00
62000fc0
62005001
62005003
62005004
62005005
62006001
62006002
62006004
62006005
62006006
62006007
62007001
62007002
62007004
62007005
62007006
6200cf50
6200cf58
6200ef20
6200ef30
6300eef8
6300eefc
6300ef00
6300ef04
6300ef08
6300ef0c
6300ef10
6300ef14
6300ef18
64000000
64000001
64000002
64000003
64000005
64000006
64000007
6400000a
6400000c
6400000e
64000010
64005000
64005009
64006000
64006009
64007000
64007009
64008000
64008009
65005000
65005003
65005007
6500500a
6500500e
65006000
65006003
65006007
6500600a
6500600e
65007000
65007003
65008000
65008003
65008007
bfffff65
c9450fc0
c9460fc0
cfffff98
e2007002
ffffff04
ffffff12
ffffff13
ffffff14
ffffff60
ffffff61
ffffff62
ffffff70
ffffff71
ffffff72
ffffff73
ffffff74
ffffff75
ffffff76
ffffff80
ffffff93
ffffff94
ffffff95
ffffff96


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