ChrisBeaumont
commented
10 years ago taking a look
Closed low-sky closed 10 years ago
ChrisBeaumont
commented
10 years ago taking a look
low-sky
commented
10 years ago hdr
Out[74]:
SIMPLE = T / file does conform to FITS standard
BITPIX = -32 / number of bits per data pixel
NAXIS = 3 / number of data axes
NAXIS1 = 382 / length of data axis 1
NAXIS2 = 382 / length of data axis 2
NAXIS3 = 350 / length of data axis 3
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
LBOUND1 = -189 / Pixel origin along axis 1
LBOUND2 = -190 / Pixel origin along axis 2
LBOUND3 = -175 / Pixel origin along axis 3
LABEL = 'T%s60+%v30+A%^50+%<20+*%+ corrected antenna temperature'/ Label of
DATE = '2012-03-09T23:19:06'/ file creation date (YYYY-MM-DDThh:mm:ss UT)
ORIGIN = 'Joint Astronomy Centre, Hilo'/ Origin of file
BSCALE = 1.0 / True_value = BSCALE * FITS_value + BZERO
BZERO = 0.0 / True_value = BSCALE * FITS_value + BZERO
HDUCLAS1= 'NDF ' / Starlink NDF (hierarchical n-dim format)
HDUCLAS2= 'DATA ' / Array component subclass
HDSTYPE = 'NDF ' / HDS data type of the component
TELESCOP= 'JCMT ' / Name of Telescope
---- x,y,z triplet for JCMT relative to centre of earth ----
ALT-OBS = 4120.0 / [m] Height of observatory above sea level
LAT-OBS = 19.82283891 / [deg] Latitude of Observatory
LONG-OBS= -155.4770278 / [deg] East longitude of observatory
---- WCS info and axis descriptions ----
---- OMP and ORAC-DR Specific ----
PROJECT = 'M09BN04 ' / PATT number
RECIPE = 'REDUCE_SCIENCE_GRADIENT'/ ORAC-DR recipe
DRGROUP = / Data Reduction group ID
SURVEY = / Survey Name
RMTAGENT= / Name of Remote Agent
AGENTID = / Unique identifier for remote agent
---- Obs Id, Date, Pointing Info ----
OBJECT = 'M33 ' / Object of interest
STANDARD= F / True if the spectral line is a standard
DATE-OBS= '2009-08-06T12:29:21.044'/ Date of observation
CRPIX1 = 191.0 / Reference pixel on axis 1
CRPIX2 = 192.0 / Reference pixel on axis 2
CRPIX3 = 176.0 / Reference pixel on axis 3
CRVAL1 = 23.4625 / Value at ref. pixel on axis 1
CRVAL2 = 30.66027778 / Value at ref. pixel on axis 2
CRVAL3 = -124.455057 / Value at ref. pixel on axis 3
CTYPE1 = 'RA---TAN' / Type of co-ordinate on axis 1
CTYPE2 = 'DEC--TAN' / Type of co-ordinate on axis 2
CTYPE3 = 'VRAD ' / Type of co-ordinate on axis 3
CDELT1 = -0.002027777831 / Pixel size on axis 1
CDELT2 = 0.002027777831 / Pixel size on axis 2
CDELT3 = 1.0 / Pixel size on axis 3
PC1_1 = 0.9238795325 / Transformation matrix element
PC1_2 = 0.3826834324 / Transformation matrix element
PC2_1 = -0.3826834324 / Transformation matrix element
PC2_2 = 0.9238795325 / Transformation matrix element
CUNIT3 = 'km/s ' / Units for axis 3
MJD-OBS = 55049.52038 / Modified Julian Date of observation
RADESYS = 'FK5 ' / Reference frame for RA/DEC values
EQUINOX = 2000.0 / [yr] Epoch of reference equinox
SPECSYS = 'LSRK ' / Standard of rest for spectral axis
SSYSSRC = 'LSRK ' / Standard of rest for source redshift
ZSOURCE = -6.000550891E-4 / [] Redshift of source
VELOSYS = -26774.13703 / [m/s] Topo. apparent velocity of rest frame
RESTFRQ = 3.457959899E+11 / [Hz] Rest frequency
IMAGFREQ= 3.358028759E+11 / [Hz] Image frequency
OBSGEO-X= -5461060.909 / [m] Observatory geocentric X
OBSGEO-Y= -2491393.621 / [m] Observatory geocentric Y
OBSGEO-Z= 2149257.916 / [m] Observatory geocentric Z
DATE-END= '2010-01-02T09:28:22'/ UTC Datetime of end of observation
DUT1 = 2.679966243E-6 / [d] UT1-UTC correction
INSTAP = / Receptor at tracking centre (if any)
INSTAP_X= 0.0 / [arcsec] Aperture X off. rel. to instr centre
INSTAP_Y= 0.0 / [arcsec] Aperture Y off. rel. to instr centre
AMSTART = 1.221228386 / Airmass at start of obervation
AMEND = 1.92543952 / Airmass at end of obervation
AZSTART = 424.6529774 / [deg] Azimuth at obs. start - mount sys.
AZEND = 294.6111973 / [deg] Azimuth at obs. end - mount sys.
ELSTART = 54.97852433 / [deg] Elevation at obs. start - mount sys.
ELEND = 31.07970495 / [deg] Elevation at obs. end - mount sys.
TRACKSYS= 'J2000 ' / TCS Tracking coordinate system
BASEC1 = 23.4625 / [deg] TCS BASE position (longitude) in TRACKSYS
BASEC2 = 30.66019444 / [deg] TCS BASE position (latitude) in TRACKSYS
HSTSTART= '2009-08-06T02:28:47'/ HST at start of observation
HSTEND = '2010-01-01T23:28:22'/ HST at end of observation
LSTSTART= '23:07:35.6228' / LST at start of observation
LSTEND = '05:54:07.3116' / LST at end of observation
---- Integration time related -----
---- ACSIS Specific ----
BACKEND = 'ACSIS ' / Name of the backend
MOLECULE= 'CO ' / Target molecular species
TRANSITI= '3 - 2 ' / Target transition for MOLECULE
DRRECIPE= 'scan_pssw_dr_recipe.ent'/ ACSIS-DR recipe name
BWMODE = '1000MHzx2048' / ACSIS total bandwidth set up
SUBSYSNR= 1 / Sub-system number
SUBBANDS= '1000MHzx2048' / ACSIS sub-band set up
NSUBBAND= 1 / Number of subbands
SUBREFP1= 1024.0 / Reference channel for subband1
SUBREFP2= / Reference channel for subband2
NCHNSUBS= 2048 / No. of channels in this sub-system
REFCHAN = 1024.0 / Reference IF channel No.
IFCHANSP= 488281.25 / [Hz] TOPO IF channel spacing (signed)
FFT_WIN = 'truncate' / Type of window used for FFT
BEDEGFAC= 1.23 / Backend degradation factor
MSROOT = 'raw_raster' / Root name of raw measurement sets
---- FE Specific ----
INSTRUME= 'HARP ' / Front-end receiver
SB_MODE = 'SSB ' / Sideband mode
IFFREQ = 5.0 / [GHz] IF Frequency
OBS_SB = 'USB ' / The observed sideband
LOFREQS = 341.0344962 / [GHz] LO Frequency at start of obs.
LOFREQE = 340.9718724 / [GHz] LO Frequency at end of obs.
REFRECEP= 'H05 ' / Receptor with unit sensitivity
TEMPSCAL= 'TA* ' / Temperature scale in use
DOPPLER = 'radio ' / Doppler velocity definition
SSYSOBS = 'TOPOCENT' / Spectral ref. frame during observation
NFREQSW = / Number of frequency switches
FREQ_THR= / [MHz] The throw used in the frequency switch
TSPSTART= 286.2226197 / [K] Temperature of the building at start of obs
TSPEND = 283.5162463 / [K] Temperature of the building at end of obser
---- Environmental Data ----
ATSTART = 4.4 / [degC] Air temp at start
ATEND = 3.0 / [degC] Air temp at end
HUMSTART= 15.6 / Rel. Humidity at start
HUMEND = 4.5 / Rel. Humidity at end
BPSTART = 625.2000122 / [mbar] Pressure at start
BPEND = 623.4000244 / [mbar] Pressure at end
TAU225ST= 0.077 / Tau at 225 GHz from CSO at start
TAU225EN= 0.091 / Tau at 225 GHz from CSO at end
TAUDATST= '2009-08-06T12:20:00'/ Time of TAU225ST observation
TAUDATEN= '2010-01-02T09:10:00'/ Time of TAU225EN observation
WVMTAUST= 0.1174788326 / 186GHz Tau from JCMT WVM at start
WVMTAUEN= 0.1368054599 / 186GHz Tau from JCMT WVM at end
WVMDATST= '2009-08-06T12:28:24'/ Time of WVMTAUST
WVMDATEN= '2010-01-02T09:28:11'/ Time of WVMTAUEN
SEEINGST= / [arcsec] SAO atmospheric seeing (start)
SEEINGEN= / [arcsec] SAO atmospheric seeing (end)
SEEDATST= / Date/Time of SEEINGST
SEEDATEN= / Date/Time of SEEINGEN
FRLEGTST= 7.888568 / [degC] Mean Front leg temperature - Start
FRLEGTEN= 4.5167045 / [degC] Mean Front Leg temperature -End
BKLEGTST= 8.617524333 / [degC] Mean back leg temperature -Start
BKLEGTEN= 5.156598667 / [degC] Mean back leg temperature -End
---- Switching and Map setup for the observation ----
SAM_MODE= 'scan ' / Sampling Mode
SW_MODE = 'pssw ' / Switch Mode: CHOP, PSSW, NONE, etc
INBEAM = / Hardware in the beam
SKYREFX = '[OFFSET] 1100 [J2000]'/ X co-ord of Reference Position
SKYREFY = '[OFFSET] -450 [J2000]'/ Y co-ord of Reference Position
OBS_TYPE= 'science ' / Type of observation
CHOP_CRD= / Chopping co-ordinate system
CHOP_FRQ= / [Hz] Chop frequency
CHOP_PA = / [deg] Chop PA; 0=in lat, 90=in long
CHOP_THR= / [arcsec] Chop throw
JIGL_CNT= / Number of offsets in jiggle pattern
JIGL_NAM= / File containing the jiggle offsets
JIG_PA = / [deg] Jiggling PA; 0=in lat, 90=in long
JIG_CRD = / Jiggling co-ordinate system
JIG_SCAL= / [arcsec] Scale of jiggle pattern
MAP_HGHT= 1200.0 / [arcsec] Requested height of map
MAP_PA = 22.5 / [deg] Requested PA of map
MAP_WDTH= 1200.0 / [arcsec] Requested width of map
LOCL_CRD= 'TRACKING' / Local offset/map PA co-ordinate system
MAP_X = 0.0 / [arcsec] Requested map offset from tel centre
SCAN_CRD= 'TRACKING' / Co-ordinate system for scanning direction
SCAN_VEL= 48.50733333 / [arcsec/sec] Scan velocity along scan axis
SCAN_DY = 29.1043 / [arcsec] Scan spacing perp. to scan axis
SCAN_PAT= 'DISCRETE_BOUSTROPHEDON'/ Scan pattern name
---- SMU ----
---- JOS parameters ----
STEPTIME= 0.15 / RTS step time during an RTS sequence
NUM_CYC = 1 / Number of times to repeat entire recipe
JOS_MULT= / MULT from JOS used in total steps calculation
JOS_MIN = 1 / MIN from JOS used in total steps calculation
NUM_NODS= / Number of times to repeat nod set
NCALSTEP= 33 / Number of RTS steps for each CAL (if any)
STBETREF= 200 / Target number of RTS steps between refs
STBETCAL= 12000 / Target number of RTS steps between cals
FOCAXIS = / Focus Axis to move (X, Y, Z)
NFOCSTEP= / Number of focal position steps (odd number)
FOCSTEP = / Distance between focus steps
---- Miscellaneous ----
SIM_CORR= F / True if any CORRTASK is simulated
SIM_IF = F / True if IF data is simulated
SIM_SMU = F / True if SMU data is simulated
SIM_TCS = F / True if TCS data is simulated
SIM_RTS = F / True if RTS data is simulated
SIM_POL = F / True if polarization data is simulated
SIMULATE= F / True if any data are simulated
STATUS = 'NORMAL ' / Status of end of obervation
---- Polarimeter Specific ----
POL_MODE= / Step-and-integrate (STOP_START) or Spin (CONSTA
ROTAFREQ= / [Hz] Spin frequency (if spinning) of polarimete
POL_CRD = / Coordinate system of polarimeter
POL_FAXS= / Frequency dependency of waveplate offset of pol
---- K-mirror Specific ----
ROT_CRD = 'TRACKING' / K-mirror coordinate system
---- Metadata Fixups ----
DHSVER = 'MOD ' / Data Handling Version
---- Data Processing ----
MEDTSYS = 296.8218689 / [K] Median MAKECUBE system temperature
EXP_TIME= 175.5339813 / [s] Median MAKECUBE exposure time
EFF_TIME= 25.26644897 / [s] Median MAKECUBE effective integration time
NUMTILES= 1 / No. of tiles covering the field
TILENUM = 1 / Index of this tile (1->NUMTILES)
Can you also copy in
wcs.wcs
and
cube._wcs.wcs
?
low-sky
commented
10 years ago wcs.wcs:
flag: 137
naxis: 3
crpix: 0x105e64e40
191 192 176
pc: 0x105e9aeb0
pc[0][]: 0.92388 0.38268 0
pc[1][]: -0.38268 0.92388 0
pc[2][]: 0 0 1
cdelt: 0x11a59f3f0
-0.0020278 0.0020278 1000
crval: 0x11a59f410
23.462 30.66 -1.2446e+05
cunit: 0x105e99780
"deg"
"deg"
"m/s"
ctype: 0x103f11a30
"RA---TAN"
"DEC--TAN"
"VRAD"
lonpole: 180.000000
latpole: 30.660278
restfrq: 345795989900.000000
restwav: 0.000000
npv: 0
npvmax: 0
pv: 0x0
nps: 0
npsmax: 0
ps: 0x0
cd: 0x11a5a3c70
cd[0][]: 0 0 0
cd[1][]: 0 0 0
cd[2][]: 0 0 0
crota: 0x103f11b10
0 0 0
altlin: 1
velref: 0
alt: ' '
colnum: 0
colax: 0x105e99860
0 0 0
wcsname: UNDEFINED
cname: 0x105e55e30
UNDEFINED
UNDEFINED
UNDEFINED
crder: 0x105e55f10
UNDEFINED UNDEFINED UNDEFINED
csyer: 0x11a58fe00
UNDEFINED UNDEFINED UNDEFINED
radesys: "FK5"
equinox: 2000.000000
specsys: "LSRK"
ssysobs: "TOPOCENT"
velosys: -26774.137030
ssyssrc: "LSRK"
zsource: -0.000600
obsgeo: -5.4611e+06 -2.4914e+06 2.1493e+06
dateobs: "2009-08-06T12:29:21.044"
dateavg: UNDEFINED
mjdobs: 55049.520380
mjdavg: UNDEFINED
ntab: 0
tab: 0x0
nwtb: 0
wtb: 0x0
types: 0x119822390
2200 2201 3000
lngtyp: "RA"
lattyp: "DEC"
lng: 0
lat: 1
spec: 2
cubeface: -1
err: 0x0
lin: (see below)
cel: (see below)
spc: (see below)
m_flag: 137
m_naxis: 3
m_crpix: 0x105e64e40 (= crpix)
m_pc: 0x105e9aeb0 (= pc)
m_cdelt: 0x11a59f3f0 (= cdelt)
m_crval: 0x11a59f410 (= crval)
m_cunit: 0x105e99780 (= cunit)
m_ctype: 0x103f11a30 (= ctype)
m_pv: 0x0 (= pv)
m_ps: 0x0 (= ps)
m_cd: 0x11a5a3c70 (= cd)
m_crota: 0x103f11b10 (= crota)
m_colax: 0x105e99860 (= colax)
m_cname: 0x105e55e30 (= cname)
m_crder: 0x105e55f10 (= crder)
m_csyer: 0x11a58fe00 (= csyer)
m_tab: 0x0 (= tab)
m_wtb: 0x0 (= wtb)
lin.*
flag: 137
naxis: 3
crpix: 0x105e64e40
191 192 176
pc: 0x105e9aeb0
pc[0][]: 0.92388 0.38268 0
pc[1][]: -0.38268 0.92388 0
pc[2][]: 0 0 1
cdelt: 0x11a59f3f0
-0.0020278 0.0020278 1000
unity: 0
err: 0x0
piximg[0][]: -0.0018734 -0.000776 -0
piximg[1][]: -0.000776 0.0018734 0
piximg[2][]: 0 0 1000
imgpix[0][]: -455.61 -188.72 -0
imgpix[1][]: -188.72 455.61 0
imgpix[2][]: 0 0 0.001
m_flag: 0
m_naxis: 0
m_crpix: 0x0
m_pc: 0x0
m_cdelt: 0x0
cel.*
flag: 137
offset: 0
phi0: 0.000000
theta0: 90.000000
ref: 23.462 30.66 180 30.66
prj: (see below)
euler: 23.462 59.34 180 0.50995 0.86021
latpreq: 0 (not required)
isolat: 0
err: 0x0
prj.*
flag: 103
code: "TAN"
r0: 57.295780
pv: (not used)
phi0: 0.000000
theta0: 90.000000
bounds: 1
name: "gnomonic"
category: 1 (zenithal)
pvrange: 0
simplezen: 1
equiareal: 0
conformal: 0
global: 0
divergent: 1
x0: 0.000000
y0: 0.000000
err: 0x0
w[]: 0 0 0 0 0
0 0 0 0 0
m: 0
n: 0
prjx2s: 0x01048dec50
prjs2x: 0x01048de6b0
spc.*
flag: 0
type: " "
code: " "
crval: UNDEFINED
restfrq: 0.000000
restwav: 0.000000
pv: (not used)
w: 0 0 0 (remainder unused)
isGrism: 0
err: 0x0
spxX2P: 0x0
spxP2S: 0x0
spxS2P: 0x0
spxP2X: 0x0cube._wcs.wcs
flag: 137
naxis: 3
crpix: 0x10684e1e0
191 192 57
pc: 0x105957c90
pc[0][]: 0.92388 0.38268 0
pc[1][]: -0.38268 0.92388 0
pc[2][]: 0 0 1
cdelt: 0x10684e200
-0.0020278 0.0020278 1000
crval: 0x11a14e2f0
23.462 30.66 -1.2446e+05
cunit: 0x106a39f10
"deg"
"deg"
"m s-1"
ctype: 0x106a4c1d0
"RA---TAN"
"DEC--TAN"
"VRAD"
lonpole: 180.000000
latpole: 30.660278
restfrq: 345795989900.000000
restwav: 0.000000
npv: 0
npvmax: 64
pv: 0x100eb3200
nps: 0
npsmax: 8
ps: 0x106870480
cd: 0x1059df730
cd[0][]: 0 0 0
cd[1][]: 0 0 0
cd[2][]: 0 0 0
crota: 0x1068074d0
0 0 0
altlin: 1
velref: 0
alt: ' '
colnum: 0
colax: 0x1068074f0
0 0 0
wcsname: UNDEFINED
cname: 0x10680a4e0
UNDEFINED
UNDEFINED
UNDEFINED
crder: 0x119322d90
UNDEFINED UNDEFINED UNDEFINED
csyer: 0x119322db0
UNDEFINED UNDEFINED UNDEFINED
radesys: "FK5"
equinox: 2000.000000
specsys: "LSRK"
ssysobs: "TOPOCENT"
velosys: -26774.137030
ssyssrc: "LSRK"
zsource: -0.000600
obsgeo: -5.4611e+06 -2.4914e+06 2.1493e+06
dateobs: "2009-08-06T12:29:21.044"
dateavg: UNDEFINED
mjdobs: 55049.520380
mjdavg: UNDEFINED
ntab: 0
tab: 0x0
nwtb: 0
wtb: 0x0
types: 0x105e9ae50
2200 2201 3000
lngtyp: "RA"
lattyp: "DEC"
lng: 0
lat: 1
spec: 2
cubeface: -1
err: 0x0
lin: (see below)
cel: (see below)
spc: (see below)
m_flag: 137
m_naxis: 3
m_crpix: 0x10684e1e0 (= crpix)
m_pc: 0x105957c90 (= pc)
m_cdelt: 0x10684e200 (= cdelt)
m_crval: 0x11a14e2f0 (= crval)
m_cunit: 0x106a39f10 (= cunit)
m_ctype: 0x106a4c1d0 (= ctype)
m_pv: 0x100eb3200 (= pv)
m_ps: 0x106870480 (= ps)
m_cd: 0x1059df730 (= cd)
m_crota: 0x1068074d0 (= crota)
m_colax: 0x1068074f0 (= colax)
m_cname: 0x10680a4e0 (= cname)
m_crder: 0x119322d90 (= crder)
m_csyer: 0x119322db0 (= csyer)
m_tab: 0x0 (= tab)
m_wtb: 0x0 (= wtb)
lin.*
flag: 137
naxis: 3
crpix: 0x10684e1e0
191 192 57
pc: 0x105957c90
pc[0][]: 0.92388 0.38268 0
pc[1][]: -0.38268 0.92388 0
pc[2][]: 0 0 1
cdelt: 0x10684e200
-0.0020278 0.0020278 1000
unity: 0
err: 0x0
piximg[0][]: -0.0018734 -0.000776 -0
piximg[1][]: -0.000776 0.0018734 0
piximg[2][]: 0 0 1000
imgpix[0][]: -455.61 -188.72 -0
imgpix[1][]: -188.72 455.61 0
imgpix[2][]: 0 0 0.001
m_flag: 0
m_naxis: 0
m_crpix: 0x0
m_pc: 0x0
m_cdelt: 0x0
cel.*
flag: 137
offset: 0
phi0: 0.000000
theta0: 90.000000
ref: 23.462 30.66 180 30.66
prj: (see below)
euler: 23.462 59.34 180 0.50995 0.86021
latpreq: 0 (not required)
isolat: 0
err: 0x0
prj.*
flag: 103
code: "TAN"
r0: 57.295780
pv: (not used)
phi0: 0.000000
theta0: 90.000000
bounds: 1
name: "gnomonic"
category: 1 (zenithal)
pvrange: 0
simplezen: 1
equiareal: 0
conformal: 0
global: 0
divergent: 1
x0: 0.000000
y0: 0.000000
err: 0x0
w[]: 0 0 0 0 0
0 0 0 0 0
m: 0
n: 0
prjx2s: 0x01048dec50
prjs2x: 0x01048de6b0
spc.*
flag: 0
type: " "
code: " "
crval: UNDEFINED
restfrq: 0.000000
restwav: 0.000000
pv: (not used)
w: 0 0 0 (remainder unused)
isGrism: 0
err: 0x0
spxX2P: 0x0
spxP2S: 0x0
spxS2P: 0x0
spxP2X: 0x0Yep crpix has changed
ChrisBeaumont
commented
10 years ago Hmm I can't reproduce this, even when making a dummy fits file with the above header
low-sky
commented
10 years ago Issue resolved though I can't recall how. I think it was a versioning drift.
ChrisBeaumont
commented
10 years ago Yes, WCS.crpix was being clobbered within spectral_slab
WCS objects are returning the correct velocity for a header but when called via SpectralCube, the coordinate is offset by a large number of pixels.