;+
;NAME:
; hsi_obs_summ_decompress
;PROJECT:
; HESSI
;CATEGORY:
; Hessi catalog generation
;PURPOSE:
; deCompression algorithm for the HESSI observing summary count rates;
;CALLING SEQUENCE:
; u = Hsi_obs_summ_decompress(c)
;INPUT:
; c = compressed count rate, a bytarr
;OUTPUT:
; u = uncompressed count rate, a lonarr, note that data is always
;     lost by the compression-decompression process up tp 6%
;HISTORY:
; jmm, 22-mar-1999, jimm@ssl.berkeley.edu
;-
FUNCTION Hsi_obs_summ_decompress, c0

;Generate lookup table
   lkup = lonarr(256)
   ll = lindgen(16)
   sum = 0

   FOR jj = 0l, 15l DO BEGIN
      lkup[16*jj:16*(jj+1)-1] = ll*2l^jj+sum
      IF(jj LT 15) THEN sum = lkup[16*(jj+1)-1]+2l^jj
   ENDFOR

;lkup ranges from 0 to 1015792l
;c must be between 0 and 255
   c = c0 > 0 & c = c < 255
   c = byte(c)
   u = lkup(c)

   RETURN, u
END