MDI Observables: mdi.fd

MDI Resident Archive

MDI Observables

mdi.fd_Ld

Description

Line depth from either 30-second or 60-second observations in full-disc mode, sampled at second 00. There is one record per minute during hours when there are any images, to assure continuity of certain ancillary data. Records for which there is no image (fill records) have the high-order bit of the QUALITY keyvalue set, and have DATAVALS = 0. Approximately 28% 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	.103	.081	<0.001	<0.001	0	0
Complete	0	.079	.078	<0.001	<0.001	0	0

Most of the data were obtained as part of certain MDI Dynamics Campaigns (continuous) in the following intervals:

1996.05.25 – 07.20
1996.08.18–23

; as part of extended daily campaigns during the following intervals:

1996.04.20
1996.04.23
1996.04.28 – 05.08
1996.05.13–24
1996.11.12–13
1996.12.03–04
2003.01.13–17
2003.03.10–24

; and as part of daily monitoring programs between 1996.04.21 and 1997.06.12, from 1997.08.30 – 09.01, and on 2010.06.15. Additional data were taken as part of very brief campaigns or test/validation sequences only at the following times:

1998.11.10 20:40–20:43
2002.03.12 17:05–17:09
2002.06.13 18:43–18:55
2006.07.27 20:22–20:26
2007.03.22 14:55–21:58
2009.08.28 22:38–22:42

Superseded records: 0 in addition to 133080 valid

Data Storage

Statistics of SUMS data storage:

SUMS directories: 2218
Average size (MB): 38.386
Minimum size (MB): .067
Maximum size (MB): 55.075
Total size (GB): 83.144

DSDS Source Series

sha.dsds[mdi][lev1.5][fd_Ld_01h]

MDI Product Codes of Contributing Level 0 Data

4c000fc0

4c05afc0

4c06afc0

4c400fc0

4c45afc0

4c481fc0

80000000 (only for fill records with no data)

Keywords

Prime key(s):

T_REC (time) : 133080/133080 valid (133080 distinct):
    range: 1996.04.20_00:00:00_TAI – 2010.06.15_15:59:00_TAI

Variable key(s):

DPC (int) : 133080/133080 valid (7 distinct):
    range: 0x80000000 – 0x4c481fc0
cparms_sg000 (string) : all 133080 default: = 'compress Rice' (compress Rice)
data_bzero (double) : all 133080 default: = 0 (0)
data_bscale (double) : all 133080 default: = 1 (1)
T_OBS (time) : 95234/133080 valid (95234 distinct):
    range: 1996.04.20_00:00:00_TAI – 2010.06.15_15:08:30_TAI
    37846 default: = 'NaN' (nan)
DATE__OBS (time) : 95234/133080 valid (95115 distinct):
    range: 1996-04-19T23:59:00Z – -4712.01.01_11:59:28Z
    37846 default: = 'NaN' (nan)
CDELT1 (float) : 95114/133080 valid (1301 distinct):
    range: 1.977344 – 1.986190
    37966 default: = 'NaN' (nan)
CDELT2 (float) : 95114/133080 valid (1301 distinct):
    range: 1.977344 – 1.986190
    37966 default: = 'NaN' (nan)
CRPIX1 (float) : 95114/133080 valid (6347 distinct):
    range: 512.051 – 513.357
    37966 default: = 'NaN' (nan)
CRPIX2 (float) : 95114/133080 valid (7964 distinct):
    range: 511.905 – 513.287
    37966 default: = 'NaN' (nan)
CROTA2 (float) : 95234/133080 valid (6 distinct):
    range: -9.8 – 180.0
    37846 default: = 'NaN' (nan)
CAR_ROT (int) : 133080/133080 valid (27 distinct):
    range: 1908 – 2097
CRLN_OBS (float) : 133080/133080 valid (132722 distinct):
    range: 0.000 – 359.999
CRLT_OBS (float) : 133080/133080 valid (132935 distinct):
    range: -7.2714 – 7.2937
DSUN_OBS (double) : 133080/133080 valid (133078 distinct):
    range: 145533348421.31 – 150586550498.25
OBS_VR (double) : 133080/133080 valid (133080 distinct):
    range: -558.737185 – 564.716291
OBS_VW (double) : 133080/133080 valid (133080 distinct):
    range: 28717.730843 – 29959.399144
OBS_VN (double) : 133080/133080 valid (133080 distinct):
    range: -3809.283189 – 3700.912862
RSUN_OBS (double) : 133080/133080 valid (133080 distinct):
    range: 953.344212 – 986.446433
R_SUN (float) : 95114/133080 valid (64906 distinct):
    range: 480.258 – 498.872
    37966 default: = 'NaN' (nan)
X0 (float) : 95114/133080 valid (11509 distinct):
    range: 511.051 – 512.357
    37966 default: = 'NaN' (nan)
Y0 (float) : 95114/133080 valid (13251 distinct):
    range: 510.905 – 512.287
    37966 default: = 'NaN' (nan)
EARTH_DT (float) : 95234/133080 valid (92153 distinct):
    range: 4.102211 – 5.654347
    37846 default: = 'NaN' (nan)
DATAVALS (int) : 133080/133080 valid (1359 distinct):
    range: 0 – 798020
MISSVALS (int) : 95234/133080 valid (1359 distinct):
    range: 0 – 798020
    37846 default: = -2147483648 (-2147483648)
DATAMIN (float) : 95114/133080 valid (16 distinct):
    range: -3.0 – 255.0
    37966 default: = 'NaN' (nan)
DATAMAX (float) : 95114/133080 valid (3655 distinct):
    range: 0.0 – 32717.0
    37966 default: = 'NaN' (nan)
DATAMEDN (float) : 95234/133080 valid (33088 distinct):
    range: -1.000 – 15602.756
    37846 default: = 'NaN' (nan)
DATAMEAN (float) : 95234/133080 valid (84266 distinct):
    range: 0.000 – 12757.536
    37846 default: = 'NaN' (nan)
DATARMS (float) : 95234/133080 valid (72523 distinct):
    range: 0.000000 – 9135.116210
    37846 default: = 'NaN' (nan)
DATASKEW (float) : 95234/133080 valid (86878 distinct):
    range: -1.763 – 612.058
    37846 default: = 'NaN' (nan)
DATAKURT (float) : 95234/133080 valid (92693 distinct):
    range: -1.816 – 380633.719
    37846 default: = 'NaN' (nan)
INTERVAL (float) : 95114/133080 valid (2 distinct):
    60.00
    30.00
    37966 default: = 'NaN' (nan)
BLD_VERS (string) : 95234/133080 valid (1 distinct):
    V7R0X
    37846 default: = '' ()
DATE (time) : 133080/133080 valid (25236 distinct):
    range: 2012-09-11T00:32Z – 2012-09-11T07:53Z
RUNTIME (time) : 95234/133080 valid (2196 distinct):
    range: 1996.12.19_01:17_UTC – 2010.06.24_21:12_UTC
    37846 default: = 'NaN' (nan)
SOURCE (string) : 95234/133080 valid (95234 distinct):
    range: prog:mdi,level:lev1,series:4c000fc0_01h[28992]:sel[0] – prog:mdi,level:lev1[9],series:4c45afc0_01h[30555],sel:[5]
    37846 default: = '' ()
BLDVER15 (string) : 95114/133080 valid (15 distinct):
    range: -50700 – 60100
    37966 default: = '' ()
CALTBLS (string) : 95114/133080 valid (1 distinct):
    mdi.caltables_intensity[fd_vers_1]
    37966 default: = '' ()
TBLXYUPD (time) : 95234/133080 valid (30 distinct):
    range: 1996.12.13_16:01:01_UTC – 2010.06.24_18:30:00_UTC
    37846 default: = 'NaN' (nan)
XY_FROM (string) : 95234/133080 valid (2 distinct):
    ????
    37846 default: = '' ()
XY_QUAL (int) : 95114/133080 valid (1 distinct):
    0
    37966 default: = -2147483648 (-2147483648)
HISTORY (string) : all 133080 default: = '' ()
POLSTATE (string) : all 133080 default: = 'UNK' (UNK)
COMMENT (string) : 133080/133080 valid (1 distinct):
    Data from the Solar Oscillations Investigation / Michelson Doppler Imager (SOI/MDI) on the Solar and Heliospheric Observatory (SOHO).
QUALITY (int) : 133080/133080 valid (37 distinct):
    range: 0x80000000 – 0x000002bd

Constant key(s):

CAMERA (string) : MDI
CONTENT (string) : MDI Full Disk Line Depth
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
INSTRUME (string) : MDI
TELESCOP (string) : SOHO
WAVELNTH (int) : 6768
ORIGIN (string) : SOI Science Support Center
ROLL_TBL (string) : mdi.roll_table
RSUN_REF (double) : 696000000
T_REC_epoch (time) : 1977.01.01_00:33:12_TAI
T_REC_step (float) : 60.0
CROP_RAD (float) : 504.0

Special Notes

this page last modified 16 May 2015, 16:09-0700