Example 3. Two log10 diagrams showing a spectral comparison between gravity anomaly estimates from ship gravity observations and Geosat altimetry. Calculations were completed using the programs sample1d and spectrum1d; the composite black and white figure was created with a shell script running the GMT programs psxy and pstext which drew the symbols, axes, annotations, and legends.

RETURNView GMT script. RETURNDownload zipped PostScript file. RETURNBack