MDI Observables: hr

MDI Resident Archive

MDI Observables

mdi.hr_V

Description

Doppler velocity from 30-second observations in high-resolution mode, sampled at second 30. The data are acquired intermittently during various campaigns, with different subrasters of the full CCD image populated. Some of the data are acquired in linear polarization and some in combinations of circular polarizations; they are distinguished by the value of the key POLSTATE. Records for which there is no image (fill records) have the high-order bit of the QUALITY flag set, and have DATAVALS = 0. <1% 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	25	.030	.167	.192	.081	.001
Complete	25	.030	.159	.190	.071	.001

Superseded records: 323 in addition to 699993 valid

Data Storage

Data for each record are stored in 2-dimensional FITS image files of varying sizes, with up to 60 files per SUMS directory, typically representing the records for one hour. Statistics of SUMS data storage:

SUMS directories: 14,138
Average size (MB): 32.516
Minimum size (MB): 0.259
Maximum size (MB): 73.173
Total size (GB): 448.946

DSDS Source Series

sha.dsds[mdi][lev1.5][hr_V_01h]

sha.dsds[mdi][lev1.5][hr_V_1024x600_01h]

sha.dsds[mdi][lev1.5][hr_V_1024x640_01h]

sha.dsds[mdi][lev1.5][hr_V_1024x700_01h]

sha.dsds[mdi][lev1.5][hr_V_700x700_01h]

sha.dsds[mdi][lev1.5][hr_Vm_01h]

sha.dsds[mdi][lev1.5][hr_Vm_1024x500_01h]

sha.dsds[mdi][lev1.5][hr_Vm_1024x600_01h]

sha.dsds[mdi][lev1.5][hr_Vm_1024x640_01h]

sha.dsds[mdi][lev1.5][hr_Vm_1024x800_01h]

sha.dsds[mdi][lev1.5][hr_Vm_700x700_01h]

sha.dsds[mdi][lev1.5][hr_Vm_500x1024_01h]

MDI Product Codes of Contributing Level 0 Data

4a022e00

4a452a00

4a472000

4a472d00

4a472d01

4a482000

4a482140

4a482240

4a482a00

4a482b00

4a492d00

4a4a2000

4a4a2240

4a4a2a00

4a4a2b00

4a4a2d00

4a4a2d01

Keywords

Prime key(s):
T_REC (time) : 700316/700316 valid (699993 distinct):
    range: 1996.03.08_01:00:30_TAI – 2010.09.28_22:30:30_TAI

Variable key(s):

cparms_sg000 (string) : all 700316 default: = 'compress Rice' (compress Rice)
data_bzero (double) : all 700316 default: = 0 (0)
data_bscale (double) : all 700316 default: = 1 (1)
T_OBS (time) : 700036/700316 valid (699941 distinct):
    range: 1996.03.08_01:00:00_TAI – 2010.09.28_22:30:30_TAI
    280 default: = 'NaN' (nan)
DATE__OBS (time) : 700036/700316 valid (699941 distinct):
    range: 1996-03-08T00:59:00Z – 2010-09-28T22:29:41Z
    280 default: = 'NaN' (nan)
CDELT1 (float) : 700036/700316 valid (5401 distinct):
    range: 0.605229 – 0.607956
    280 default: = 'NaN' (nan)
CDELT2 (float) : 700036/700316 valid (5401 distinct):
    range: 0.605229 – 0.607956
    280 default: = 'NaN' (nan)
CRPIX1 (float) : 700036/700316 valid (147247 distinct):
    range: -24.464 – 499.548
    280 default: = 'NaN' (nan)
CRPIX2 (float) : 700036/700316 valid (420777 distinct):
    range: -3394367.750 – 314.256
    280 default: = 'NaN' (nan)
CROTA2 (float) : 700036/700316 valid (5836 distinct):
    range: -10.0 – 180.0
    280 default: = 'NaN' (nan)
CAR_ROT (int) : 700316/700316 valid (138 distinct):
    range: 1906 – 2101
CRLN_OBS (float) : 700316/700316 valid (689280 distinct):
    range: 0.000 – 360.000
CRLT_OBS (float) : 700316/700316 valid (691644 distinct):
    range: -7.2933 – 7.2937
DSUN_OBS (double) : 700316/700316 valid (699988 distinct):
    range: 145550077785.42 – 150775328328.48
OBS_VR (double) : 700316/700316 valid (699993 distinct):
    range: -588.730676 – 587.618354
OBS_VW (double) : 700316/700316 valid (699987 distinct):
    range: 28599.213962 – 29983.480021
OBS_VN (double) : 700316/700316 valid (699993 distinct):
    range: -3817.804679 – 3718.017608
RSUN_OBS (double) : 700316/700316 valid (699993 distinct):
    range: 952.150571 – 986.333051
R_SUN (float) : 700036/700316 valid (356116 distinct):
    range: 1566.710 – 1629.621
    280 default: = 'NaN' (nan)
X0 (float) : 700036/700316 valid (147252 distinct):
    range: -25.464 – 498.548
    280 default: = 'NaN' (nan)
Y0 (float) : 700036/700316 valid (420569 distinct):
    range: -3394368.750 – 313.256
    280 default: = 'NaN' (nan)
EARTH_DT (float) : 700036/700316 valid (614441 distinct):
    range: 4.098454 – 5.621250
    280 default: = 'NaN' (nan)
DATAVALS (int) : 700316/700316 valid (7932 distinct):
    range: 0 – 1048576
MISSVALS (int) : 700036/700316 valid (7678 distinct):
    range: 0 – 1048576
    280 default: = -2147483648 (-2147483648)
DATAMIN (float) : 700036/700316 valid (5056 distinct):
    range: -32767.0 – 1269.0
    280 default: = 'NaN' (nan)
DATAMAX (float) : 700036/700316 valid (5143 distinct):
    range: 0.0 – 32767.0
    280 default: = 'NaN' (nan)
DATAMEDN (float) : 700036/700316 valid (576749 distinct):
    range: -4437.109 – 7353.967
    280 default: = 'NaN' (nan)
DATAMEAN (float) : 700036/700316 valid (693765 distinct):
    range: -4461.092 – 7634.662
    280 default: = 'NaN' (nan)
DATARMS (float) : 700036/700316 valid (628937 distinct):
    range: 0.000000 – 11274.647500
    280 default: = 'NaN' (nan)
DATASKEW (float) : 700036/700316 valid (695986 distinct):
    range: -11.597 – 18.901
    280 default: = 'NaN' (nan)
DATAKURT (float) : 700036/700316 valid (680247 distinct):
    range: -1.955 – 1786.007
    280 default: = 'NaN' (nan)
INTERVAL (float) : 700036/700316 valid (2 distinct):
    60.00
    30.00
    280 default: = 'NaN' (nan)
DATE (time) : 700316/700316 valid (60677 distinct):
    range: 2012-06-22T00:25Z – 2012-06-24T12:57Z
RUNTIME (time) : 700036/700316 valid (13268 distinct):
    range: 1998.11.09_00:38_UTC – 2010.11.05_02:53_UTC
    280 default: = 'NaN' (nan)
DPC (int) : 700036/700316 valid (17 distinct):
    range: 0x4a022e00 – 0x4a4a2d01
    280 default: = -2147483648 (0x80000000)
SOURCE (string) : 700036/700316 valid (699941 distinct):
    range: prog:mdi,level:lev1[10],series:4a482b00_01h[39028],sel:[0] – prog:mdi,level:lev1[9],series:4a482b00_01h[39035],sel:[9]
    280 default: = '' ()
BLDVER15 (string) : 700036/700316 valid (37 distinct):
    range: -40801 – 60100
    280 default: = '' ()
CALTBLS (string) : 700011/700316 valid (5 distinct):
    mdi.caltables_doppler[hr_tune_5]
    *û
    mdi.caltables_doppler[hr_tune_2]
    mdi.caltables_doppler[hr_tune_1]
    mdi.caltables_doppler[hr_tune_6]
    305 default: = '' ()
TBLXYUPD (time) : 700036/700316 valid (325 distinct):
    range: 1998.07.27_18:21:17_UTC – 2010.11.04_18:11:32_UTC
    280 default: = 'NaN' (nan)
XY_FROM (string) : 700036/700316 valid (2 distinct):
    SMOOTH
    DEFAULT
    280 default: = '' ()
XY_QUAL (int) : 700036/700316 valid (2 distinct):
    -1
    0
    280 default: = -2147483648 (-2147483648)
POLSTATE (string) : 700092/700316 valid (2 distinct):
    LP
    CP
    224 default: = 'UNK' (UNK)
HISTORY (string) : all 700316 default: = '' ()
BLD_VERS (string) : 700036/700316 valid (2 distinct):
    V6R0X
    V6R3X
    280 default: = 'unknown' (unknown)
QUALITY (int) : 700316/700316 valid (39 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) : m/s
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
T_REC_epoch (time) : 1977.01.01_00:33:13_TAI
T_REC_step (float) : 60.0
CONTENT (string) : MDI High Resolution Dopplergram
COMMENT (string) : Data from the Solar Oscillations Investigation / Michelson Doppler Imager (SOI/MDI) on the Solar and Heliospheric Observatory (SOHO)

Special Notes

There are far fewer fill records than expected if the series is gap-filled by hour (280 total); they are all in the range:
- mdi.hr_V[1998.11.11_20:00:30_TAI/1h]
There are 305 records for which INTERVAL = 60 (there should not be any); they are all in the ranges:
- mdi.hr_V[1996.03.08_01:00:30_TAI/5m]
- mdi.hr_V[1996.03.08_01:10:30_TAI/5m]
- mdi.hr_V[1996.03.08_01:20:30_TAI/5m]
- mdi.hr_V[1996.03.08_01:31:30_TAI/5m]
- mdi.hr_V[1996.03.08_01:41:30_TAI/5m]
and all have DPC 4a022e00
There are 12 records with a non-printing value of CALTBLS; these are multiple early (and superseded) versions of records
- mdi.hr_V[1998.11.11_20:34:30_TAI/4m] (mdi.hr_V[:#35-#38,#96-#98,#155-#158])
and all have DPC 4a4a2000

this page last modified 24 Jul 2015, 16:44-0700