Update script to download from NASA also

datasets/MEX/HRSC/download_sample.sh

 #!/bin/bash
-set -ue
+#set -ue
 
 DRY_RUN=${DRY_RUN:-""}
 
@@ -33,12 +33,20 @@ function usage() {
   echo ""
   echo "  Print (wget) commands for downloading Data for Orbit I957:"
   echo ""
-  echo "    $ DRY_RUN=y ORBIT=I975 ./download_sample.sh data"
+  echo "    $ DRY_RUN=y ORBIT=0103 ./download_sample.sh data"
   echo ""
 }
 
-server='ftp://psa.esac.esa.int'
-path='pub/mirror/MARS-EXPRESS/HRSC/MEX-M-HRSC-5-REFDR-DTM-V1.0'
+SRV=${SRV:-ESA}
+
+if [ "$SRV" = 'ESA' ]; then
+  SERVER='ftp://psa.esac.esa.int'
+  PDSATH='pub/mirror/MARS-EXPRESS/HRSC/MEX-M-HRSC-5-REFDR-DTM-V1.0'
+else
+  [ "$SRV" = 'NASA' ] || { echo '$SRV should be either ESA or NASA'; exit; }
+  SERVER='ftp://pds-geosciences.wustl.edu'
+  PDSATH='mex/mex-m-hrsc-5-refdr-dtm-v1/mexhrs_2001'
+fi
 
 docs=(AAREADME.TXT CATALOG/CATINFO.TXT DOCUMENT EXTRAS/EXTRINFO.TXT INDEX/INDXINFO.TXT VOLDESC.CAT) 
 meta=(INDEX)
@@ -49,15 +57,14 @@ function do_wget() {
   #
   content=$@
   for c in ${content[@]}; do
-    # REMOVE 'echo' to actually download the content
-    #
+    data="${SERVER}/${PDSATH}/${c}"
+    [ "$SRV" = 'NASA' ] && data=$(echo "$data" | tr '[:upper:]' '[:lower:]')
     if [ ! -n "$DRY_RUN" ]; then
       # download
-      echo "Remove this 'echo'"
-      echo wget -r -nH --cut-dirs=4 --directory-prefix=ESA ${server}/${path}/${c}
+      wget -r -nH --cut-dirs=4 --directory-prefix=${SRV} ${data}
     else
       # dry-run
-      echo wget -r -nH --cut-dirs=4 --directory-prefix=ESA ${server}/${path}/${c}
+      echo "wget -r -nH --cut-dirs=4 --directory-prefix=${SRV} ${data}"
     fi
   done
 }