LANCE MODIS and VIIRS Near Real Time (NRT) production operates 24 hours a day, 7 days a week, using two standalone systems on separate network routes. It is expected that this redundancy will reduce system downtime to less than 1%.
NRT production acquires session-based L0 files from the EOS Data and Operations System (EDOS); the end of a session is available within 10-30 minutes after real time. NRT production also acquires necessary ancillary products from ancillary data suppliers. However, production rules for some science codes have been relaxed with respect to these ancillary data to allow the data products to be generated within 3 hours of real time.
All of the Level 1 (L1), L2, and L3 products generated by NRT production have been modified to add "NRT" to the filenames to distinguish NRT products from the standard forward-processed products. In addition, Digital Object Identifier (DOI) metadata have been added to all NRT products.
Data products are archived in a rolling archive for 7+ days and are available for distribution by direct access to the NRT HTTPS sites.
NRT products can differ from standard science quality products. For details, refer to NRT vs Standard Products.