Das2 Site Catalog

Sites
> U. Iowa
> Mars Express
> Ephemeris

Spacecraft location data - Jet Propulsion Laboratory (NAIF)

Planetocentric Cyl - Mars Express cylindrical orbit parameters from SPICE kernels
Planetographic - Mars Express orbit parameters from SPICE kernels
Planetographic L5 - Mars Express orbit parameters from high level (L5) product files

Catalog Path: tag:das2.org,2012:site:/uiowa/mars_express/ephemeris
Read From: https://das2.org/catalog/das/site/uiowa/mars_express/ephemeris.json


   import json
   import das2

   node = das2.get_node("site:/uiowa/mars_express/ephemeris")

   # Pretty print node content
   s = json.dumps(node.props, ensure_ascii=False, indent="  ", sort_keys=True)
   print(s)
   
   # List and access sub-nodes
   node.keys()
   subnode = node['planetocentric_cyl']


   #include <stdio.h>
   #include <das2/core.h>

   DasNode* pRoot = new_RootNode(NULL, NULL, NULL);
   DasNode* pNode = DasNode_subNode(pRoot, "tag:das2.org,2012:site:/uiowa/mars_express/ephemeris", NULL, NULL);
   DasJdo*  pJdo  = DasNode_getJdo(pNode, NULL);
   size_t uLen;
   const char* sOut = DasJdo_writePretty(pJdo, "   ", "\n", &uLen);
   fputs(sOut, stdout);