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2.2 Description of the products

2.2.1 Product naming convention

For each product, the file name is built up from a fixed number of fields, in a fixed order:

filename = <product_ID> <processing_stage_flag><originator_ID><start_day> <“_”> <start_time> <“_”> <duration> <phase>

<cycle> <“_”> <relative_orbit> <“_”> <absolute_orbit> <“_”><counter><“.”> <satellite_ID> <.extension>


Those fields are:

<product_ID>: specific string describing the sensor, the mode and the processing level (10 characters)

<processing_stage_flag>: N for Near Real Time product; V for fully validated product; letters between N and V in order level of consolidation

<originator_ID>: processing centre of the product (3 character string; DPA for D-PAC; FIN for FINPAC; ACR for ACRI; …)

<start_day>: starting day of the product from the UTC time of the first DSR

<start_time>: starting time of the product from the UTC time of the first DSR

<duration>: time coverage of the product in s

<phase>:   mission phase identifier

<cycle>: cycle number within the mission phase

<relative_orbit>: Relative orbit number within the cycle at the beginning of the product

<absolute_orbit>: Absolute orbit at the beginning of the product

<counter>:   For a given product type the counter is incremented by 1 for each new product generated by the product originator.

<satellite_ID>: N1 stands for ENVISAT

For instance, the file name:


corresponds to a GOMOS Level 2 product ("GOM_NL__2P") processed in Near-Real Time ("N") at ACRI ("ACR"), containing measurements starting on 05/12/2002, 14:09:01 UTC ("20021205_140901") and for 40s ("00000040"), during the ENVISAT ("N1") phase 2 ("2) and cycle 11 ("011"); the relative orbit of ENVISAT was 439 ("00439"), and the absolute orbit was 4000 ("04000").