|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
[fitsbits] [Fwd: PV index perhaps wrong in version 3.0]
William Pence wrote:
The question below regarding WCS keyword usage was sent to the FITS support office. Is Table 8.1 in the FITS Standand incorrect? (See http://fits.gsfc.nasa.gov/fits_standard.html ). Should it state that LONPOLEa and LATPOLEa are associated with PVi_3a and PVi_4a instead of PVi_1a and PVi_2a? Bill -------- Original Message -------- Subject: PV index perhaps wrong in version 3.0 Date: Mon, 08 Sep 2008 14:35:34 +0200 L.S., Table 8.1 section 8, page 74 lists for the native longitude and latitude of the celestial pole the keywords LONPOLEa= and LATPOLEa= which, according to the table is equivalent to PVi_1a and PVi_2a. However, in the same table these keywords were previously attached to the fiducial point. Also Calabretta and Greisen use PVi_3a and PVi_4a in their article 'Representations of celestial coordinates in FITS'. Please can you inform me about what is right (i.e. standard FITS) in this case? I believe that the user is correct and _3 and _4 should be used. I was hoping Mark Calabretta would confirm this. Eric |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[fitsbits] Version 1.0 of the nom.tam Java FITS library released | Tom McGlynn | FITS | 1 | April 23rd 11 12:59 PM |
[fitsbits] [Fwd: PV index perhaps wrong in version 3.0] | William Pence[_2_] | FITS | 0 | September 10th 08 05:36 PM |
[fitsbits] Version 1.0 of the nom.tam Java FITS library released | Rob Seaman | FITS | 0 | June 10th 08 09:59 PM |
[fitsbits] fitsbits--sci.astro.fits gateway fully operationalagain | Don Wells | FITS | 0 | September 29th 06 05:17 PM |
[fitsbits] ANNOUNCE: Astro::FITS::CFITSIO version 1.0.4 | William Pence | FITS | 0 | May 31st 06 07:51 PM |