MPF ROVER MARS ALPHA PROTON X-RAY
                                      SPECTROMETER EDR V1.0
The APXS EDRs are a collection of 27 measurements (173 data files) 
obtained by the Alpha Proton X-ray Spectrometer (APXS). Of these, 
nine are measurements of rock, seven are of soil (if Scooby Doo 
is an indurated soil rather than a rock), and eleven are of atmosphere.  The atmosphere was measured on Sol 1 to …