***** File CALINFO.TXT
This directory contains compressed digital calibration data associated
with some of the Halley images obtained by the Large-Scale Phenomena Network.
Text tables linking calibration and Halley files are given in the file
CALIB.TXT in the DOCUMENT subdirectory, and a delimited index of the same
information is in the file CALIB.IDX in the INDEX subdirectory. [N.B.: most,
but not all calibration data are contained in separate files; some are
deposited on the Halley images themselves. Refer to the last section of
CALIB.TXT.]
The type of calibration varies: there are sensitometer spots, step
wedges, and standard stars, depending on what was provided by the original
observers. FITS headers provide all of the known information about the
calibration data sets, although in some cases no relative intensities for
(e.g.) step wedges were provided by the observers. A previous pixel
compression technique was used on the calibration data in this directory and
on the full-resolution Halley images in directory Cyymmmdd; refer to the file
COMPRESS.TXT in the DOCUMENT subdirectory for specific details on compression.
A full description of the calibration data themselves is given in CALIB.TXT,
also in the DOCUMENT subdirectory.
The extensions for files of calibration data follow the IHW filename
conventions (.IMQ = compressed image, .HDR = header, .LBL = label). To
reconstruct the original FITS byte stream, the .HDR and the .IMQ files for the
appropriate observation must be concatenated. The original FITS headers have
been modified using the FITS extensions to take account of the fact that the
data have been compressed.
Name Last modified Size Description
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Parent Directory -
![[TXT]](/icons/text.gif)
calinfo.txt 04-May-1990 05:45 2.3K
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lspn4109.hdr 07-Jan-1990 09:09 14K [FITS header]
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lspn4109.imq 07-Jan-1990 09:09 264K
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lspn4109.lbl 31-May-1990 09:46 1.6K [PDS label]
lspn4110.hdr 07-Jan-1990 09:09 14K [FITS header]
lspn4110.imq 07-Jan-1990 09:09 264K
lspn4110.lbl 31-May-1990 09:46 1.6K [PDS label]
lspn4111.hdr 07-Jan-1990 09:09 11K [FITS header]
lspn4111.imq 07-Jan-1990 09:10 262K
lspn4111.lbl 31-May-1990 09:46 1.6K [PDS label]
lspn4112.hdr 07-Jan-1990 09:10 14K [FITS header]
lspn4112.imq 07-Jan-1990 09:10 264K
lspn4112.lbl 31-May-1990 09:46 1.6K [PDS label]
lspn4113.hdr 07-Jan-1990 09:10 14K [FITS header]
lspn4113.imq 07-Jan-1990 09:10 264K
lspn4113.lbl 31-May-1990 09:46 1.6K [PDS label]
lspn4114.hdr 07-Jan-1990 09:10 14K [FITS header]
lspn4114.imq 07-Jan-1990 09:10 264K
lspn4114.lbl 31-May-1990 09:49 1.6K [PDS label]
lspn4115.hdr 07-Jan-1990 09:10 11K [FITS header]
lspn4115.imq 07-Jan-1990 09:10 259K
lspn4115.lbl 31-May-1990 09:49 1.6K [PDS label]
lspn4116.hdr 07-Jan-1990 09:10 11K [FITS header]
lspn4116.imq 07-Jan-1990 09:10 259K
lspn4116.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4117.hdr 07-Jan-1990 09:10 11K [FITS header]
lspn4117.imq 07-Jan-1990 09:10 262K
lspn4117.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4118.hdr 07-Jan-1990 09:10 14K [FITS header]
lspn4118.imq 07-Jan-1990 09:11 267K
lspn4118.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4119.hdr 07-Jan-1990 09:11 11K [FITS header]
lspn4119.imq 07-Jan-1990 09:11 262K
lspn4119.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4120.hdr 07-Jan-1990 09:11 11K [FITS header]
lspn4120.imq 07-Jan-1990 09:11 259K
lspn4120.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4121.hdr 07-Jan-1990 09:11 14K [FITS header]
lspn4121.imq 07-Jan-1990 09:11 264K
lspn4121.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4122.hdr 07-Jan-1990 09:11 11K [FITS header]
lspn4122.imq 07-Jan-1990 09:11 262K
lspn4122.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4123.hdr 07-Jan-1990 09:11 11K [FITS header]
lspn4123.imq 07-Jan-1990 09:11 262K
lspn4123.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4124.hdr 07-Jan-1990 09:11 14K [FITS header]
lspn4124.imq 07-Jan-1990 09:12 264K
lspn4124.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4125.hdr 07-Jan-1990 09:12 11K [FITS header]
lspn4125.imq 07-Jan-1990 09:12 259K
lspn4125.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4126.hdr 07-Jan-1990 09:12 11K [FITS header]
lspn4126.imq 07-Jan-1990 09:12 262K
lspn4126.lbl 31-May-1990 09:50 1.6K [PDS label]
lspn4127.hdr 07-Jan-1990 09:12 14K [FITS header]
lspn4127.imq 07-Jan-1990 09:12 264K
lspn4127.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4128.hdr 07-Jan-1990 09:12 14K [FITS header]
lspn4128.imq 07-Jan-1990 09:12 264K
lspn4128.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4129.hdr 07-Jan-1990 09:12 14K [FITS header]
lspn4129.imq 07-Jan-1990 09:12 267K
lspn4129.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4130.hdr 07-Jan-1990 09:12 11K [FITS header]
lspn4130.imq 07-Jan-1990 09:12 262K
lspn4130.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4131.hdr 07-Jan-1990 09:12 11K [FITS header]
lspn4131.imq 07-Jan-1990 09:13 259K
lspn4131.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4132.hdr 07-Jan-1990 09:13 14K [FITS header]
lspn4132.imq 07-Jan-1990 09:13 264K
lspn4132.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4133.hdr 07-Jan-1990 09:13 14K [FITS header]
lspn4133.imq 07-Jan-1990 09:13 264K
lspn4133.lbl 31-May-1990 09:51 1.6K [PDS label]
lspn4134.hdr 07-Jan-1990 09:13 14K [FITS header]
lspn4134.imq 07-Jan-1990 09:13 267K
lspn4134.lbl 31-May-1990 09:51 1.6K [PDS label]
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