[LALT_M.txt]
#Regional grid topographic data in the mare Serenitatis (N16-36, E10-30)

1) File description
*ASCII
*File name: LALT_M.txt
*Data Order (unit): [Longitude (degree)] [Latitude (degree)] [Height (km)]
*Format (Fortran): f9.5, f9.5, f9.4
*Sample:
 10.03125 35.96875  -2.1285
 10.09375 35.96875  -1.9856
 10.15625 35.96875  -1.7712
  ---
*Horizontal resolution: 1/16��
*Data number: 102400

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 1/16�� 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).