| MDI Resident Archive |
MDI Observables
|
mdi.limb_figure
Description
Intensity of the computed continuum from either 30-second or 60-second
observations in full-disc mode, sampled at second 00, summed over a 25-min
interval under a gaussian-like weighting function, in each of approximately
22,000 pixels (the exact number varies from 21654 to 23410) in an annulus
about 6 pixels thick encompassing the solar limb. The selection annulus
changes frequently (once every few days) to account for the changing apparent
semi-diameter as the distance of the spacecraft from the Sun changes.
The phasing of the sampling minute varies through the mission.
The data are part of the MDI Structure Program, and are intended to be
continuous throughout the mission. There is one record every 12 minutes
during times of instrument operation. Records for which there is no image
(fill records) have the high-order bit of the QUALITY keyvalue set,
and have DATAVALS = 0.
Approximately 2% of the records are fill.
Coverage / Duty Cycle
The fraction of possible time intervals containing partial or complete
images during each mission phase is as follows:
| <1996.04.20
(Record count only) |
1996.04.20 – 1996.05.22 |
1996.05.23 – 1998.06.24 |
1998.10.20 – 1998.12.21 |
1999.02.03 – 2010.09.14 |
2010.09.14 – 2011.04.12 |
>2011.04.12
(Record count only) |
| Partial |
0 | .744 | .979 | .909 | .956 | .862 | 0 |
| Complete |
0 | .629 | .961 | .896 | .929 | .853 | 0 |
Superseded records: 0 in addition to 622080 valid
Data Storage
Statistics of SUMS data storage:
- SUMS directories: 5181
- Average size (MB): 19.531
- Minimum size (MB): 0.239
- Maximum size (MB): 20.975
- Total size (GB): 98.819
DSDS Source Series
- sha.dsds[mdi][lev1.4][limb_figure]
MDI Product Codes of Contributing Level 0 Data
- 1684ef20 [in use 1996.04.20–30]
- 1685df** (19) [in use 1996.10.01 – 1997.03.21]
- 1685e*** (6) [in use 1996.04.30 – 1996.10.01]
- 1686d*** (40) [in use 1997.03.21 – 2011.04.12]
- 80000000 (only for fill records with no data)
The Data Product Code is unique for each selection of pixels comprising the
selected limb annulus.
Keywords
Prime key(s):
T_REC (time) : 622080/622080 valid (622080 distinct):
range: 1996.04.20_00:00:00_TAI – 2011.04.12_23:48:00_TAI
Variable key(s):
cparms_sg000 (string) : all 622080 default: = 'compress Rice' (compress Rice)
data_bzero (double) : all 622080 default: = 0 (0)
data_bscale (double) : all 622080 default: = 1 (1)
T_OBS (time) : 607968/622080 valid (607968 distinct):
range: 1996.04.19_23:54:00_TAI – 2011.04.12_23:03:00_TAI
14112 default: = 'NaN' (nan)
DATE__OBS (time) : 607968/622080 valid (607968 distinct):
range: 1996-04-19T23:42:00Z – 2011-04-12T22:50:56Z
14112 default: = 'NaN' (nan)
CDELT1 (float) : 607703/622080 valid (25238 distinct):
range: 1.977283 – 1.986302
14377 default: = 'NaN' (nan)
CDELT2 (float) : 607703/622080 valid (25238 distinct):
range: 1.977283 – 1.986302
14377 default: = 'NaN' (nan)
CRPIX1 (float) : 607968/622080 valid (22797 distinct):
range: 511.232 – 514.360
14112 default: = 'NaN' (nan)
CRPIX2 (float) : 607968/622080 valid (44826 distinct):
range: 510.263 – 514.082
14112 default: = 'NaN' (nan)
CROTA2 (float) : 607968/622080 valid (11096 distinct):
range: -162.9 – 180.0
14112 default: = 'NaN' (nan)
CAR_ROT (int) : 621815/622080 valid (198 distinct):
range: 1908 – 2109
265 default: = -2147483648 (-2147483648)
CRLN_OBS (float) : 621815/622080 valid (613111 distinct):
range: 0.000 – 359.999
265 default: = 'NaN' (nan)
CRLT_OBS (float) : 621815/622080 valid (613107 distinct):
range: -7.3032 – 7.2937
265 default: = 'NaN' (nan)
DSUN_OBS (double) : 621815/622080 valid (621811 distinct):
range: 145493489597.25 – 150819330904.95
265 default: = 'NaN' (nan)
OBS_VR (double) : 621815/622080 valid (621815 distinct):
range: -588.730657 – 587.618349
265 default: = 'NaN' (nan)
OBS_VW (double) : 621815/622080 valid (621815 distinct):
range: 28556.637571 – 30079.387972
265 default: = 'NaN' (nan)
OBS_VN (double) : 621815/622080 valid (621815 distinct):
range: -3827.567215 – 3720.906088
265 default: = 'NaN' (nan)
RSUN_OBS (double) : 621815/622080 valid (621815 distinct):
range: 951.872773 – 986.716678
265 default: = 'NaN' (nan)
R_SUN (float) : 607703/622080 valid (378950 distinct):
range: 479.279 – 498.872
14377 default: = 'NaN' (nan)
X0 (float) : 607968/622080 valid (37806 distinct):
range: 510.232 – 513.360
14112 default: = 'NaN' (nan)
Y0 (float) : 607968/622080 valid (59999 distinct):
range: 509.263 – 513.082
14112 default: = 'NaN' (nan)
EARTH_DT (float) : 607703/622080 valid (544026 distinct):
range: 4.095383 – 5.654347
14377 default: = 'NaN' (nan)
DATAVALS (int) : 622080/622080 valid (2636 distinct):
range: 0 – 23410
MISSVALS (int) : 607968/622080 valid (1665 distinct):
range: 0 – 21396
14112 default: = -2147483648 (-2147483648)
DATAMIN (float) : 607968/622080 valid (3336 distinct):
range: -32767.0 – 11931.0
14112 default: = 'NaN' (nan)
DATAMAX (float) : 607968/622080 valid (8570 distinct):
range: -910.0 – 32767.0
14112 default: = 'NaN' (nan)
DATAMEDN (float) : 607968/622080 valid (590365 distinct):
range: -25444.566 – 29098.182
14112 default: = 'NaN' (nan)
DATAMEAN (float) : 607968/622080 valid (569204 distinct):
range: -14038.689 – 27122.529
14112 default: = 'NaN' (nan)
DATARMS (float) : 607968/622080 valid (504545 distinct):
range: 0.660493 – 22013.775400
14112 default: = 'NaN' (nan)
DATASKEW (float) : 607968/622080 valid (605255 distinct):
range: -3.252 – 88.489
14112 default: = 'NaN' (nan)
DATAKURT (float) : 607968/622080 valid (502935 distinct):
range: -1.908 – 10593.986
14112 default: = 'NaN' (nan)
DATE (time) : 622080/622080 valid (612520 distinct):
range: 2014-06-23T21:32Z – 2014-06-24T02:15Z
RUNTIME (time) : 607968/622080 valid (4973 distinct):
range: 2000.07.11_20:45_UTC – 2011.06.06_17:01_UTC
14112 default: = 'NaN' (nan)
SOURCE (string) : 607968/622080 valid (607968 distinct):
range: prog:mdi,level:lev1,series:1686df04_01d[5964],sel:[100] – prog:mdi,level:lev1[9],series:1685df70_01d[1437],sel:[9]
14112 default: = '' ()
BLDVER15 (string) : 607848/622080 valid (32 distinct):
range: -40800 – 60100
14232 default: = '' ()
CALTBLS (string) : 607968/622080 valid (1 distinct):
mdi.caltables_intensity[fd_vers_1]
14112 default: = '' ()
TBLXYUPD (time) : 607968/622080 valid (986 distinct):
range: 2000.07.11_17:43:23_UTC – 2011.06.06_16:51:36_UTC
14112 default: = 'NaN' (nan)
XY_FROM (string) : 607968/622080 valid (1 distinct):
SMOOTH
14112 default: = '' ()
XY_QUAL (int) : 606828/622080 valid (1 distinct):
0
15252 default: = -2147483648 (-2147483648)
HISTORY (string) : all 622080 default: = '' ()
BLD_VERS (string) : 607968/622080 valid (1 distinct):
V8R5X
14112 default: = 'unknown' (unknown)
CROPMIN (float) : 607968/622080 valid (40 distinct):
range: 476.000 – 495.500
14112 default: = 'NaN' (nan)
CROPMAX (float) : 607968/622080 valid (40 distinct):
range: 482.500 – 502.000
14112 default: = 'NaN' (nan)
DPC (int) : 607968/622080 valid (66 distinct):
range: 0x1684ef20 – 0x1686df7c
14112 default: = -2147483648 (0x80000000)
QUALITY (int) : 622080/622080 valid (29 distinct):
range: 0x80000000 – 0x000002fd
Constant key(s):
CRVAL1 (float) : 0.000
CRVAL2 (float) : 0.000
CTYPE1 (string) : HPLN-TAN
CTYPE2 (string) : HPLT-TAN
CUNIT1 (string) : arcsec
CUNIT2 (string) : arcsec
WCSAXES (int) : 2
WCSNAME (string) : Helioprojective-cartesian
BUNIT (string) : Arbitrary Intensity Units
CADENCE (float) : 60.0
CAMERA (string) : MDI
TELESCOP (string) : SOHO
WAVELNTH (int) : 6768
ORIGIN (string) : SOI Science Support Center
ROLL_TBL (string) : mdi.roll_table
RSUN_REF (double) : 696000000
POLSTATE (string) : LP
T_REC_epoch (time) : 1977.01.01_00:33:12_TAI
T_REC_step (float) : 720.0
INTERVAL (float) : 1380.00
CONTENT (string) : MDI limb figure
COMMENT (string) : Data from the Solar Oscillations Investigation / Michelson Doppler Imager (SOI/MDI) on the Solar and Heliospheric Observatory (SOHO)
Special Notes
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this page last modified 19 Jun 2015, 17:28-0700
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