[LALT_G.txt]
#Global grid topographic data of the Moon with 1 degree horizontal resolution

1) File description
*ASCII
*File name: LALT_G.txt
*Data Order (unit): [Longitude (degree)] [Latitude (degree)] [Height (km)]
*Format(fortran): f5.1, f6.1, f9.4
*Data sample:
  0.5  89.5  -1.1524
  1.5  89.5  -1.1617
  2.5  89.5  -1.1705
  ---
*Resolution: 1��
*Data number: 64800

2) Notes
*Instrument: KAGUYA(SELENE) / LALT
*Observation Period: From 30 December, 2007 to 31 March, 2008.
*The lunar global topographic data in the above period are pre-processed (anti-aliasing) 
 and interpolated to 1�� grid data using commands of GMT software (the interpolation is
 performed by 'surface' command)[1].
*The coordinate is based on the mean Earth / polar axis system[2]. The height reference
 is the sphere whose radius is 1737.4 km centered on the COM (center of mass).

3) References
[1] P. Wessel, W. H. F. Smith, EOS 72, 441 (1991).
[2] P. K. Seidelmann et al., Celestial Mech. Dyn. Astr. 98, 155, (2007).