PDS3 Parser

This module implements a very rudimentary parser for the PDS3 data format, as specified by NASA here

Usage

Given a PDS file like this abridged example:

PDS_VERSION_ID                         = PDS3
MISSION_NAME                           = "LUNAR ORBITER 2"
LAUNCH_DATE                            = 1966-11-06
FOOTPRINT_POINT_LATITUDE               = (4.217, 3.6209, 3.6514, 4.2473)
FOOTPRINT_POINT_LONGITUDE              = (37.6944, 37.5729, 37.4228, 37.544)

We can convert this to a document record using pds:parse/1.

{ok, Bin} = file:read_file("FRAME_2017_H2.LBL").
{ok, Doc} = pds:parse(Bin).
Lat = proplists:get_value("FOOTPRINT_POINT_LATITUDE", Doc#pds_document.properties).
Lon = proplists:get_value("FOOTPRINT_POINT_LONGITUDE", Doc#pds_document.properties).
{Lat, Lon}.
> {{4.2473,3.6514,3.6209,4.217},
>     {37.544,37.4228,37.5729,37.6944}}

Document records contain three lists:

• properties, any top-level key-value pair in the document
• pointers, a proplist of pointer name to file name
• objects, a proplist of object name to a second proplist of object values.

Type conversions

• Values in parens are converted to Erlang tuples of the contained values.
• Dates and times are parsed to the format {erlang:date(), erlang:time()}
• Values with units are represented as a tuple of {Value, Unit}
• Comments are ignored

Pds format	Erlang format
1966-11-06	{1966, 11, 6}
1966-11-18T15:25:18.22	{{1966, 11, 18}, {15, 25, 18.22}}
-.0345 <km/s>	{-0.0345, "km/s"}
(4.217, 3.6209, 3.6514, 4.2473)	{4.217, 3.6209, 3.6514, 4.2473}