The optional global attribute FILE_PROJECT_ID is an additional multi-field string entry to the

FILE_ACCESS attribute in Section 4.3.3 defining custom project identification codes. These project

identification codes are defined by and specific to campaigns or individual projects that have set them. For

example, for the Envisat validation only, one Envisat Cal/Val  FILE_PROJECT_ID field is mandatory, namely

the Announcement of Opportunity (AO) responsible for providing the data.



Entry: Empty, one or more semicolon-separated fields

Format: [id1;id2;id3;…]

Example: FILE_PROJECT_ID = AOID126 for Envisat Cal/Val AO 126