5.2

Rootnames

Rootnames of HST data files follow the naming convention defined in Table 5.1.

Table 5.1: IPPPSSOOT Root Filenames

Character	Meaning
I	Instrument used, will be one of: e - Engineering data f - Fine Guidance Sensors i - Wide Field Camera 3 j - Advanced Camera for Surveys l - Cosmic Origins Spectrograph n - Near Infrared Camera and Multi-Object Spectrograph o - Space Telescope Imaging Spectrograph s - Engineering subset data t - Guide star position data u - Wide Field/Planetary Camera-2 v - High Speed Photometer w - Wide Field/Planetary Camera x - Faint Object Camera y - Faint Object Spectrograph z - Goddard High Resolution Spectrograph
PPP	Program ID; can be any combination of letters or numbers (46,656 possible combinations). There is a unique association between program ID and proposal ID.
SS	Observation set ID; any combination of letters or numbers (1,296 possible combinations).
OO	Observation ID; any combination of letters or numbers (1,296 possible combinations).
T	Source of transmission or association product number m - Merged real time and tape recorded n - Retransmitted merged real time and tape recorded o - Retransmitted real time (letter “O’) p - Retransmitted tape recorded q - Solid-state recorder r - Real time (not recorded) s - Retransmitted solid-state recorder t - Tape recorded 0 - Primary association product (number zero) 1-8 - ACS, COS, NICMOS, or WFC3 association sub-product