Final Report of BeJamDetect Project

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5.4.1.2. Very strong RFI events on October 23 and October 24
On these two days there were not only very strong power input increase due to interference signals,
reaching levels of 15.8 and 17 dB, as there was also a high frequency of RFI events raising the input
power above 5 dB (the threshold for strong signals). Figure 5-13 demonstrates this in a zoomed
perspective. On October 23 there were 44 detections in a span of approximately 2 hours, and 88
detections on October 24 in approximately 6 hours between 6:00 and 17:00.

L1 band, Input power at central array element

—— 1
——— APin at Ant#7 (dBm)

m 10

f

{a

JE 4
8:00:00 18:30:00 19:00:00

9:30.00 20:00:00 20:30:00
ITC time fü = 23-Oct-2023. 00-0100

— LL Ürnhnn,
21:00:00 21:30:00 22:00:00
Oct 23. 2023

a) October 23

L1 band, Input power at central array element
— —— r

1 LT
| ——— \ Pin at Ant#7 (däm}

D
ä 10

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=
a

A
A

07:00:00 08:00:00 09:00:00 10:00:00 11:00:00 12:00:00 13:00:00 14:00:00 15:00:00 16:00:00
JTC time, t0 = 24-Oct-2023, 00:00:00 Oct 24, 2023

b) October 24

2igure 5-13 - Multiple very strong RFI detections in L1 band on October 23 and 24

Fitle: Final Report
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