MDI Observables: mdi.fd_M

MDI Resident Archive

MDI Observables

mdi.fd_M_extract

Description

Line-of-sight magnetic field from 30-second observations in full-disc mode, sampled once per minute at second 30 and extracted into subrasters of dimension 1024*750 or 1024*500 on the camera. The data are acquired occasionally during certain targeted campaigns.

Normally there are only records when there are images. However, during the hours 16:00–16:59 on 1996.07.26 and again from 19:00–19:59 on 1996.10.21 there is one record per minute regardless of whether there is an image. Records for which there is no image (fill records) have the high-order bit of the QUALITY keyvalue set, and have DATAVALS = 0. <1% of the records are fill (a total of 113). -->

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	0	.046	.149	.002	0	0
Complete	0	0	.046	.147	.002	0	0

Most of the data were obtained during the following campaign intervals:

1996.08.02–03
1996.08.05–07
1996.08.13–14
1996.08.23–24
1996.08.29 – 09.02
1996.09.06–07
1996.09.13
1996.09.27–30
1996.10.23–25
1996.11.06–09
1996.11.22 – 12.03
1997.01.19–22
1997.01.25–27
1997.02.18
1997.03.22–25
1997.07.15–19
1997.08.20–22
1997.12.20–21
1998.05.01–04
1998.05.06–08
1998.05.12–14
1998.05.18–21
1998.05.26 – 06.12
1998.06.20–23
1998.11.05–15
1998.12.09–21
1999.07.31 – 08.01
1999.08.03–06
1999.08.26 – 09.01
2000.02.02–03
2001.02.09
2001.02.16
2003.11.26 – 12.02

Additional data were taken as part of very brief test/validation sequences only at the following times:

1996.07.26 16:37–16:38, 17:18–17:19, 18:00–18:01
1996.10.21 19:05–19:09
2002.03.12 16:54–16:56, 17:11–17:15
2003.11.25 19:16–19:19
2006.07.31 19:57–20:04
2007.03.21 21:35–21:38
2007.03.22 15:00–15:03
2009.08.28 22:33–22:36
2009.09.02 13:47–13:50

Superseded records: 307 in addition to 82636 valid

Data Storage

Statistics of SUMS data storage:

SUMS directories: 1707
Average size (MB): 55.128
Minimum size (MB): 0.820
Maximum size (MB): 78.054
Total size (GB): 91.899

DSDS Source Series

sha.dsds[mdi][lev1.5][fd_M_1024x750_01h]

sha.dsds[mdi][lev1.5][fd_M_1024x500_01h]

MDI Product Codes of Contributing Level 0 Data

80000000 (only for fill records with no data)

48472040

48472d00

Keywords

Prime key(s):

T_REC (time) : 82943/82943 valid (82636 distinct):
    range: 1996.07.26_16:00:30_TAI – 2009.09.02_13:50:30_TAI

Variable key(s):

DPC (int) : 82943/82943 valid (3 distinct):
    0x48472040
    0x80000000
    0x48472d00
cparms_sg000 (string) : all 82943 default: = 'compress Rice' (compress Rice)
data_bzero (double) : all 82943 default: = 0 (0)
data_bscale (double) : all 82943 default: = 0.01 (0.01)
T_OBS (time) : 82540/82943 valid (82523 distinct):
    range: 1996.07.26_16:37:30_TAI – 2009.09.02_13:50:30_TAI
    403 default: = 'NaN' (nan)
DATE__OBS (time) : 82540/82943 valid (82523 distinct):
    range: 1996-07-26T16:36:45Z – 2009-09-02T13:49:41Z
    403 default: = 'NaN' (nan)
CDELT1 (float) : 82540/82943 valid (1273 distinct):
    range: 1.977345 – 1.986038
    403 default: = 'NaN' (nan)
CDELT2 (float) : 82540/82943 valid (1273 distinct):
    range: 1.977345 – 1.986038
    403 default: = 'NaN' (nan)
CRPIX1 (float) : 82540/82943 valid (13000 distinct):
    range: 512.062 – 513.700
    403 default: = 'NaN' (nan)
CRPIX2 (float) : 82540/82943 valid (36507 distinct):
    range: -23.633 – 513.106
    403 default: = 'NaN' (nan)
CROTA2 (float) : 82540/82943 valid (5948 distinct):
    range: -11.0 – 180.0
    403 default: = 'NaN' (nan)
CAR_ROT (int) : 82943/82943 valid (28 distinct):
    range: 1912 – 2087
CRLN_OBS (float) : 82943/82943 valid (82527 distinct):
    range: 0.001 – 359.992
CRLT_OBS (float) : 82943/82943 valid (82537 distinct):
    range: -7.2385 – 7.2926
DSUN_OBS (double) : 82943/82943 valid (82636 distinct):
    range: 145606093595.54 – 150601986081.80
OBS_VR (double) : 82943/82943 valid (82636 distinct):
    range: -558.392503 – 564.729428
OBS_VW (double) : 82943/82943 valid (82636 distinct):
    range: 28755.462062 – 29919.755739
OBS_VN (double) : 82943/82943 valid (82636 distinct):
    range: -3803.416749 – 3711.604559
RSUN_OBS (double) : 82943/82943 valid (82636 distinct):
    range: 953.246500 – 985.953598
R_SUN (float) : 82540/82943 valid (72318 distinct):
    range: 481.247 – 498.135
    403 default: = 'NaN' (nan)
X0 (float) : 82540/82943 valid (20070 distinct):
    range: 511.062 – 512.700
    403 default: = 'NaN' (nan)
Y0 (float) : 82540/82943 valid (38319 distinct):
    range: -24.633 – 512.106
    403 default: = 'NaN' (nan)
EARTH_DT (float) : 82540/82943 valid (79119 distinct):
    range: 4.133638 – 5.641010
    403 default: = 'NaN' (nan)
DATAVALS (int) : 82943/82943 valid (1303 distinct):
    range: 0 – 768000
MISSVALS (int) : 82540/82943 valid (1291 distinct):
    range: 0 – 768000
    403 default: = -2147483648 (-2147483648)
DATAMIN (float) : 82540/82943 valid (1446 distinct):
    range: -91732.8 – 0.0
    403 default: = 'NaN' (nan)
DATAMAX (float) : 82540/82943 valid (1429 distinct):
    range: 0.0 – 92250.6
    403 default: = 'NaN' (nan)
DATAMEDN (float) : 82540/82943 valid (62546 distinct):
    range: -663.074 – 646.183
    403 default: = 'NaN' (nan)
DATAMEAN (float) : 82540/82943 valid (78874 distinct):
    range: -1601.173 – 924.380
    403 default: = 'NaN' (nan)
DATARMS (float) : 82540/82943 valid (82205 distinct):
    range: 0.000000 – 7369.781740
    403 default: = 'NaN' (nan)
DATASKEW (float) : 82540/82943 valid (82471 distinct):
    range: -814.875 – 715.100
    403 default: = 'NaN' (nan)
DATAKURT (float) : 82540/82943 valid (82409 distinct):
    range: -1.680 – 696989.688
    403 default: = 'NaN' (nan)
DATE (time) : 82943/82943 valid (12685 distinct):
    range: 2012-09-12T00:01Z – 2012-09-13T22:59Z
RUNTIME (time) : 82540/82943 valid (1501 distinct):
    range: 2001.02.20_16:31_UTC – 2009.10.01_17:34_UTC
    403 default: = 'NaN' (nan)
SOURCE (string) : 82540/82943 valid (82523 distinct):
    range: prog:mdi,level:lev1[1],series:48472040_01h[119036],sel:[0] – prog:mdi,level:lev1[6],series:48472040_01h[31511],sel:[9]
    403 default: = '' ()
BLDVER15 (string) : 82540/82943 valid (8 distinct):
    range: -50500 – 60100
    403 default: = '' ()
TBLXYUPD (time) : 82540/82943 valid (15 distinct):
    range: 2001.02.06_21:54:43_UTC – 2009.09.29_19:44:47_UTC
    403 default: = 'NaN' (nan)
XY_FROM (string) : 82540/82943 valid (1 distinct):
    SMOOTH
    403 default: = '' ()
XY_QUAL (int) : 82540/82943 valid (1 distinct):
    0
    403 default: = -2147483648 (-2147483648)
BLD_VERS (string) : 82540/82943 valid (1 distinct):
    V7R0X
    403 default: = '' ()
HISTORY (string) : all 82943 default: = '' ()
COMMENT (string) : 82943/82943 valid (1 distinct):
    Data from the Solar Oscillations Investigation / Michelson Doppler Imager (SOI/MDI) on the Solar and Heliospheric Observatory (SOHO).
QUALITY (int) : 82943/82943 valid (26 distinct):
    range: 0x80000000 – 0x000002bd

Constant key(s):

CONTENT (string) : MDI Extracts of Full Disk Magnetograms
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) : Gauss
CADENCE (float) : 1.0
INTERVAL (float) : 30.00
POLSTATE (string) : CP
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
SINRHOTB (string) : mdi.sinrho_table
T_REC_epoch (time) : 1977.01.01_00:33:13_TAI
T_REC_step (float) : 60.0

Special Notes

DP 48472040 was always acquired in conjunction with DP 42472040 (mdi.fd_V_extract).

DP 48472d00 was always acquired in conjunction with DP 404b3d00 (mdi.fd_I0_extract) and 42472d00 (mdi.fd_V_extract).

this page last modified 17 Jun 2015, 16:37-0700