;; EGM96 Model, as downloaded from U. Texas CSR FTP site (w/ zero tide HONKCR field)
;; $Id: egm96.desc,v 1.1 2004/01/06 00:36:44 craigm Exp $
{ $
  name: 'EGM96', $              ;; Title of the model
  type: 'GRAVITY', $            ;; Type of model 'GRAVITY' or 'BFIELD'
  filename: 'EGM96.GEO', $      ;; Model coefficient file name
  reference: 'Lemoine, F. G. et al. 1998, "The Development of the Joint NASA GSFC and NIMA Geopotential Model EGM96," NASA/TP-1998-206861, NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771, USA', $
  url: 'ftp://ftp.csr.utexas.edu/pub/grav/EGM96.GEO.Z', $
  nmax: 360L, $                 ;; Maximum order (inclusive)
  mmax: 360L, $                 ;; Maximum degree (inclusive)
  normalized: 1, $              ;; Coefficients are normalized (1=yes, 0=no)
  mu: 398600.44150D+09, $       ;; GM for central body [m^3/s^2]
  a: 6378136.30d, $             ;; Mean equatorial radius [m]
  tide: 'ZERO', $               ;; Tide system (ZERO, FREE, or MEAN)
  epoch: 1986.0d, $             ;; Epoch of model coefficients (Julian year)
  C21: -.1869876359548955D-09,$ ;; C21 coefficient (IERS Conventions 1996)
  S21:  .1195280120306540D-08,$ ;; S21 coefficient (IERS Conventions 1996)
  C20_dot: 1.16275534D-11,$     ;; C20 rate (unitless; yr^-1)
  C21_dot: -0.32d-11, $         ;; C21 rate (unitless; yr^-1)
  S21_dot: +1.62d-11, $         ;; S21 rate (unitless; yr^-1)
  rowstart: 4L, $               ;; Coefficient starting row (first row = 0)
  nrows: 65338L, $              ;; Number of coefficient rows in file
  ncolrange: [6,8], $           ;; Column range for degree (first col = 0)
  mcolrange: [9,11], $          ;;    "     "    "  order 
  Ccolrange: [12,30], $         ;;    "     "    "  C coefficients
  Scolrange: [31,49], $         ;;    "     "    "  S coefficients
  dCcolrange: [50,62], $        ;;    "     "    "  C std deviation
  dScolrange: [63,75] $         ;;    "     "    "  S std deviation
}