Local changes for the AA-Alert project for the PRSDada libraray
This is a clone of the PSRDada repository on SourceForge
Summary of changes:
- metadata written by dada_dbevent to the ringbuffer header
- inclusion of arrival time in the triggering
An event looks like this:
N_EVENTS [n]
[UTC_START]
[START] [START_FRACTIONAL] [END] [END_FRACTIONAL] [ARRIVAL] [ARRIVAL_FRACTIONAL] [DM] [SNR] [WIDTH] [BEAM]
Where N_EVENTS is a literal string, and [NAME] are variables in the following format:
- n: uint64
- UTC_START, START, END, ARRIVAL: strptime format: "%Y-%m-%d-%H:%M:%S", with UTC appended (no conversions)
- START_FRACTIONAL, END_FRACTIONAL, ARRIVAL_FRACTIONAL: uint64
- DM: sscanf format %f
- SNR: sscanf format %f
- WIDTH: sscanf format %f
- BEAM: sscanf format %u
The metadata that is added to the ringbuffer header is:
| Key | Type | Documentation |
|---|---|---|
| OBS_OFFSET | uint64 | |
| FILE_SIZE | ld | |
| N_EVENTS | u | Number of events in this slice of data |
| EVENTxxxx_SNR | f | Copied from trigger |
| EVENTxxxx_DM | f | Copied from trigger |
| EVENTxxxx_WIDTH | f | Copied from trigger |
| EVENTxxxx_BEAM | u | Copied from trigger |
| EVENTxxxx_ARRIVAL | uint64 | Copied from trigger |
| EVENTxxxx_ARRIVAL_NUMER | uint64 | Copied from trigger |
| EVENTxxxx_ARRIVAL_DENOM | uint64 | Copied from trigger |
Where xxxx is the event number (a zero padded integer starting at 0, reset for each new ringbuffer header).
Jisk Attema [email protected]