diff --git a/applications/lofar2/doc/prestudy/lift_lightning.txt b/applications/lofar2/doc/prestudy/lift_lightning.txt new file mode 100644 index 0000000000000000000000000000000000000000..b4104d70022d0784fcc01a7b814b0863145f041f --- /dev/null +++ b/applications/lofar2/doc/prestudy/lift_lightning.txt @@ -0,0 +1,16 @@ + + + +LIFT 27 June 2022 meeting +- only raw, no subband data +- cosmic ray uses all antennas of one station, lightning ~ 6 antennas but all Dutch stations + . 6 dual pol antennas per station with long baselines + . 96 LBA --> 8 - 16 possible useful combinations of 6 antennas --> dependent on RCU allocation +- cosmic ray is commensal, lightning is dedicated mode +- cosmic ray 2 ms event, lightning 1 s events +- individually controlled antenna buffers +- transient detection based on power after 40 - 80 MHz BPF +- read out via LCU (with local storage, later TCP to CEP) or directly to CEP (UDP) +- 2 * 8 GB / (12 * 16b / 8b * 0.2 GHz) = 3.33 s seems enough storage + . 3.33 * 16b / 14b = 3.81 s + . header overhead 5 % --> 3.81 * 0.95 = 3.61 s