Data Set Overview : The Hubble Space Telescope Wide Field Planetary Camera 2 data archive contains calibrated data of Mars observed between April 27, 1999 and September 4, 2001. These are full-disk images of Mars obtained primarily through narrowband filters and in the wavelength interval of 255 to 1042 nm. The data have been calibrated to radiance factor, or I/F. The archive is divided into 13 groups according to different observation dates, and each group contains five different types of FITS files: 1. simple cylindrical projection images in a cube with backplanes containing emission and incidence angles 2. orthographic projection images in a cube with backplanes containing latitude, longitude, emission angle, and incidence angle 3. Unprojected image for each wavelength 4. simple cylindrical projection image for each wavelength (used to compile the cube #1) 5. orthographic projection image for each wavelength (used to compile the cube #2)  Important parameters and information can be found in the file headers. For the files with the 'RL' prefix, please see near the bottom of the header for more organized information. This can be helpful in further manipulation of the data. For example, The value of F (solar flux) used in our calibration process is included in the headers with the keyword starting with 'FSUN', so that one can go back to radiance units (I).  The following table summarizes some information on the thirteen observation groups in the data archive. The first column list the observation dates in the format, YYMMDD. The resolution is the best spatial resolution at the sub-Earth point for images obtained on the PC1 chip. ------------------------------------------------------------------ Observation Wavelengths Diam. Phase Ang. Resolution Date (nm) (inches) (degree) (km/pixel) ------------------------------------------------------------------ 255, 336, 410, 502, 990427 547, 588, 631, 673, 16.2 2.70 19.4 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 990428 547, 588, 631, 673, 16.2 2.92 19.3 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 990501 547, 588, 631, 673, 16.2 5.90 19.3 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 990506 547, 588, 631, 673, 16.1 10.00 19.4 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 375, 410, 010116 502, 588, 631, 673, 5.7 34.95 54.6 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 375, 410, 010213 502, 588, 631, 673, 6.9 37.54 45.3 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 375, 410, 010402 502, 588, 631, 673, 10.6 36.46 29.6 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 375, 410, 010513 502, 588, 631, 673, 16.4 23.18 19.1 763, 835, 953, 1042 ------------------------------------------------------------------ 410, 502, 588, 631, 010626 673, 1042, 410, 16.2 2.70 19.4 502, 673 ------------------------------------------------------------------ 255, 336, 410, 502, 010809 547, 588, 631, 673, 15.9 38.09 19.6 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 010810 547, 588, 631, 673, 15.8 38.54 19.8 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 010814 547, 588, 631, 673, 15.3 39.66 20.4 763, 835, 953, 1042 ------------------------------------------------------------------ 255, 336, 410, 502, 010904 547, 588, 631, 673, 13.0 44.21 24.1 763, 835, 953, 1042 ------------------------------------------------------------------   Data : The data products are stored as FITS images and cubes. All files with 'IMG' suffix contain 2D image in a simple FITS format. The remaining files with the 'CUB' ending have 3D array consisting of 2D images stacked in increasing wavelength order (except for 010626 data set) with additional information stored in the backplanes, which have the same array size as the preceding 2D images. The FITS headers contain detailed and tailored information about their content.   Coordinate System : Mars areocentric, west positive.

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