From fedc49ea6eb761e315b7c7568c62062e749c6279 Mon Sep 17 00:00:00 2001
From: Eric Kooistra <kooistra@astron.nl>
Date: Wed, 31 Jan 2024 15:26:02 +0100
Subject: [PATCH] Add event packet fields.
---
.../prestudy/station2_sdp_transient_detection.txt | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/applications/lofar2/doc/prestudy/station2_sdp_transient_detection.txt b/applications/lofar2/doc/prestudy/station2_sdp_transient_detection.txt
index 3595c039b0..ea8da0654a 100644
--- a/applications/lofar2/doc/prestudy/station2_sdp_transient_detection.txt
+++ b/applications/lofar2/doc/prestudy/station2_sdp_transient_detection.txt
@@ -99,6 +99,8 @@ Message
5) Planning topics Transient detection
+https://support.astron.nl/confluence/display/SBe/SDP+Transient+detection+planning+estimate
+
- Comparison with LOFAR1 [1, 5]
. IIR filter with programmable coefficients to implement:
- HPF (> 30MHz), BPF
@@ -114,7 +116,16 @@ Message
. binning for LI, because 10000 triggers / flash, so only trigger strongest per bin (= time slot)
- Comparison cosmic ray and lightning [1, 2]
. Check that LI binning is transparant to CR
- . Format of detection message
+ . Format of detection message [5]
+ - The ID of the triggered channel.
+ - The time of the trigger with sample time accuracy. E.g. the sample number of the first
+ sample above the threshold.
+ - A value representing the width of the pulse. E.g. the number of samples between the first
+ sample and the last above the threshold. If the width is large (e.g. more than 255 samples)
+ only the fact that this is a wide pulse is needed.
+ - Desirable but not required is a value representing the height of the pulse. This could the
+ value of the largest sample, or the sum over all samples in the pulse, or whatever is easier
+ to implement.
- Requirements, MVP
. number of signal inputs per FPGA (max 12 single pol)
. one polarization per antenne ?
--
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