Ancillary Description Information
Ancillary Descriptions (AD) in the GCMD consists of brief descriptions of:
- Data Centers (AD-Dc) (Example: National Snow and Ice Data Center).
- Projects or Campaigns (AD-Pj) (Example: the Tropical Ocean Global Atmosphere project, TOGA).
- Platforms (AD-Pl) (formerly called Sources; example: the spacecraft description for the Terra satellite).
- Instruments (AD-I) (formerly called Sensors; example: the remote sensing instrument, AVHRR).
Ancillary Descriptions provide related background
information but do not
directly describe the data sets. However,
they are usually linked to data
sets. For assistance in writing ancillary
information, you may visit the
Ancillary
Description Writer's Guide and use the
tools to create
or modify a description.
| This document should be cited as: Ancillary Description Writer's Guide, 2013. Global Change Master Directory. National Aeronautics and Space Administration. [http://gcmd.nasa.gov/add/ancillaryguide/]. |
