Spatial Extent - Track

Element Description

Track is a recently added element that is only available at the granule level. The Track element provides orbit information for data collected via satellite including Cycle, Pass and Tiles. This allows for file level searches by Track information.

Best Practices

The Track element was initially designed to support the Surface Water and Ocean Topography (SWOT) mission managed by NASA's PO.DAAC data center. The Track element can be used to describe 3 sub-components:

1. Cycle: A cycle encompasses data from 1 full day of orbits.
2. Pass: A pass includes data from a half-orbit.
3. Tiles: Here, a tile is defined as a 64 km x 64 km square to the left and right of the ground track. A set of consecutive tiles make up a pass.  

Examples:

Metadata Validation and QA/QC

All metadata entering the CMR goes through the below process to ensure metadata quality requirements are met. All records undergo CMR validation before entering the system. The process of QA/QC is slightly different for NASA and non-NASA data providers. Non-NASA providers include interagency and international data providers and are referred to as the International Directory Network (IDN).

Please see the expandable sections below for flowchart details.

Dialect Mappings

UMM Migration

Future Mappings

N/A

"DataGranule": {
  "Track" : "Cycle"
}

History

UMM Versioning

ARC Documentation