Problem with GNSS - delay in detecting satellites

[GoncaloS]

Hello, 

i'm having a problem with the satellite detection time when I start gnss search. When I start the search, for a while at first the satellites are not detected and then they start to be detected. The delay time is often distinctive. I'm currently using gnss in single fix mode with a timeout of 65 seconds. In the nrf_modem_gnss_use_case_set() function, I'm using the flags NRF_MODEM_GNSS_USE_CASE_SCHED_DOWNLOAD_DISABLE and  NRF_MODEM_GNSS_USE_CASE_MULTIPLE_HOT_START. 

Details setup:
Modem FW: 2.0.2
SDK version: 2.8.0
Board: nRF9161 dk

Below are some examples that demonstrate the problem described:

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// 1º search //

[00:28:05.962,188] <inf> main: Searching... N. Satellites: 0

[00:28:06.962,829] <inf> main: Searching... N. Satellites: 0

[00:28:07.963,836] <inf> main: Searching... N. Satellites: 0

[00:28:08.964,904] <inf> main: Searching... N. Satellites: 0

[00:28:09.965,484] <inf> main: Searching... N. Satellites: 0

[00:28:10.965,881] <inf> main: Searching... N. Satellites: 0

[00:28:11.966,247] <inf> main: Searching... N. Satellites: 0

[00:28:12.966,918] <inf> main: Searching... N. Satellites: 0

[00:28:13.967,163] <inf> main: Searching... N. Satellites: 0

[00:28:14.967,529] <inf> main: Searching... N. Satellites: 0

[00:28:15.968,322] <inf> main: Searching... N. Satellites: 0

[00:28:16.968,627] <inf> main: Searching... N. Satellites: 0

[00:28:17.969,177] <inf> main: Searching... N. Satellites: 0

[00:28:18.969,390] <inf> main: Searching... N. Satellites: 0

[00:28:19.969,818] <inf> main: Searching... N. Satellites: 0

[00:28:20.969,940] <inf> main: Searching... N. Satellites: 0

[00:28:21.970,916] <inf> main: Searching... N. Satellites: 0

[00:28:22.971,435] <inf> main: Searching... N. Satellites: 0

[00:28:23.971,527] <inf> main: Searching... N. Satellites: 0

[00:28:24.972,015] <inf> main: Searching... N. Satellites: 0

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

// 1º search //
[00:28:05.962,188] <inf> main: Searching... N. Satellites: 0
[00:28:06.962,829] <inf> main: Searching... N. Satellites: 0
[00:28:07.963,836] <inf> main: Searching... N. Satellites: 0
[00:28:08.964,904] <inf> main: Searching... N. Satellites: 0
[00:28:09.965,484] <inf> main: Searching... N. Satellites: 0
[00:28:10.965,881] <inf> main: Searching... N. Satellites: 0
[00:28:11.966,247] <inf> main: Searching... N. Satellites: 0
[00:28:12.966,918] <inf> main: Searching... N. Satellites: 0
[00:28:13.967,163] <inf> main: Searching... N. Satellites: 0
[00:28:14.967,529] <inf> main: Searching... N. Satellites: 0
[00:28:15.968,322] <inf> main: Searching... N. Satellites: 0
[00:28:16.968,627] <inf> main: Searching... N. Satellites: 0
[00:28:17.969,177] <inf> main: Searching... N. Satellites: 0
[00:28:18.969,390] <inf> main: Searching... N. Satellites: 0
[00:28:19.969,818] <inf> main: Searching... N. Satellites: 0
[00:28:20.969,940] <inf> main: Searching... N. Satellites: 0
[00:28:21.970,916] <inf> main: Searching... N. Satellites: 0
[00:28:22.971,435] <inf> main: Searching... N. Satellites: 0
[00:28:23.971,527] <inf> main: Searching... N. Satellites: 0
[00:28:24.972,015] <inf> main: Searching... N. Satellites: 0
[00:28:25.972,473] <inf> main: Searching... N. Satellites: 0
[00:28:26.972,564] <inf> main: Searching... N. Satellites: 0
[00:28:27.972,747] <inf> main: Searching... N. Satellites: 0
[00:28:28.973,205] <inf> main: Searching... N. Satellites: 0
[00:28:29.973,449] <inf> main: Searching... N. Satellites: 0
[00:28:30.974,090] <inf> main: Searching... N. Satellites: 0
[00:28:31.974,304] <inf> main: Searching... N. Satellites: 0
[00:28:32.974,517] <inf> main: Searching... N. Satellites: 0
[00:28:33.974,731] <inf> main: Searching... N. Satellites: 0
[00:28:34.975,311] <inf> main: Searching... N. Satellites: 0
[00:28:35.975,799] <inf> main: sv: 20, cn0: 150
[00:28:35.975,830] <inf> main: sv: 26, cn0: 280
[00:28:35.975,860] <inf> main: Searching... N. Satellites: 2
[00:28:36.976,104] <inf> main: sv: 20, cn0: 150
[00:28:36.976,135] <inf> main: sv: 26, cn0: 280
[00:28:36.976,135] <inf> main: Searching... N. Satellites: 2
[00:28:37.976,196] <inf> main: sv: 20, cn0: 150
[00:28:37.976,196] <inf> main: sv: 26, cn0: 280
[00:28:37.976,196] <inf> main: Searching... N. Satellites: 2
[00:28:38.976,470] <inf> main: sv: 20, cn0: 150
[00:28:38.976,501] <inf> main: sv: 26, cn0: 280
[00:28:38.976,501] <inf> main: Searching... N. Satellites: 2
[00:28:39.976,837] <inf> main: sv: 20, cn0: 150
[00:28:39.976,837] <inf> main: sv: 26, cn0: 280
[00:28:39.976,837] <inf> main: Searching... N. Satellites: 2
[00:28:40.977,081] <inf> main: sv: 20, cn0: 150
[00:28:40.977,111] <inf> main: sv: 26, cn0: 280
[00:28:40.977,142] <inf> main: Searching... N. Satellites: 2
[00:28:41.977,661] <inf> main: sv: 20, cn0: 150
[00:28:41.977,661] <inf> main: sv: 26, cn0: 280
[00:28:41.977,661] <inf> main: Searching... N. Satellites: 2
[00:28:42.977,844] <inf> main: sv: 20, cn0: 150
[00:28:42.977,874] <inf> main: sv: 26, cn0: 280
[00:28:42.977,874] <inf> main: Searching... N. Satellites: 2
[00:28:43.978,088] <inf> main: sv: 20, cn0: 150
[00:28:43.978,088] <inf> main: sv: 26, cn0: 280
[00:28:43.978,088] <inf> main: Searching... N. Satellites: 2
[00:28:44.978,363] <inf> main: sv: 20, cn0: 150
[00:28:44.978,393] <inf> main: sv: 26, cn0: 280
[00:28:44.978,424] <inf> main: Searching... N. Satellites: 2
[00:28:45.978,607] <inf> main: sv: 20, cn0: 150
[00:28:45.978,607] <inf> main: sv: 26, cn0: 280
[00:28:45.978,637] <inf> main: Searching... N. Satellites: 2
[00:28:46.978,820] <inf> main: sv: 20, cn0: 150
[00:28:46.978,851] <inf> main: sv: 26, cn0: 280
[00:28:46.978,851] <inf> main: Searching... N. Satellites: 2
[00:28:47.979,217] <inf> main: sv: 20, cn0: 150
[00:28:47.979,217] <inf> main: sv: 26, cn0: 280
[00:28:47.979,248] <inf> main: Searching... N. Satellites: 2
[00:28:48.979,980] <inf> main: sv: 20, cn0: 150
[00:28:48.980,010] <inf> main: sv: 26, cn0: 280
[00:28:48.980,041] <inf> main: Searching... N. Satellites: 2
[00:28:49.980,041] <inf> main: sv: 20, cn0: 150
[00:28:49.980,072] <inf> main: sv: 26, cn0: 280
[00:28:49.980,072] <inf> main: Searching... N. Satellites: 2
[00:28:50.980,285] <inf> main: sv: 20, cn0: 150
[00:28:50.980,316] <inf> main: Searching... N. Satellites: 1
[00:28:51.980,804] <inf> main: sv: 20, cn0: 150
[00:28:51.980,804] <inf> main: Searching... N. Satellites: 1
[00:28:52.980,834] <inf> main: sv: 20, cn0: 150
[00:28:52.980,865] <inf> main: Searching... N. Satellites: 1
[00:28:53.981,201] <inf> main: sv: 20, cn0: 150
[00:28:53.981,231] <inf> main: Searching... N. Satellites: 1
[00:28:54.981,628] <inf> main: sv: 20, cn0: 150
[00:28:54.981,658] <inf> main: Searching... N. Satellites: 1
[00:28:55.981,719] <inf> main: sv: 20, cn0: 150
[00:28:55.981,719] <inf> main: Searching... N. Satellites: 1
[00:28:56.982,208] <inf> main: sv: 20, cn0: 150
[00:28:56.982,238] <inf> main: Searching... N. Satellites: 1
[00:28:57.982,482] <inf> main: sv: 20, cn0: 150
[00:28:57.982,482] <inf> main: Searching... N. Satellites: 1
[00:28:58.983,001] <inf> main: sv: 20, cn0: 150
[00:28:58.983,032] <inf> main: Searching... N. Satellites: 1
[00:28:59.983,154] <inf> main: sv: 20, cn0: 150
[00:28:59.983,154] <inf> main: Searching... N. Satellites: 1
[00:29:00.983,428] <inf> main: sv: 20, cn0: 150
[00:29:00.983,459] <inf> main: Searching... N. Satellites: 1
[00:29:01.983,673] <inf> main: sv: 20, cn0: 150
[00:29:01.983,673] <inf> main: Searching... N. Satellites: 1
[00:29:02.984,497] <inf> main: sv: 20, cn0: 150
[00:29:02.984,527] <inf> main: Searching... N. Satellites: 1
[00:29:03.984,985] <inf> main: sv: 20, cn0: 150
[00:29:03.984,985] <inf> main: sv: 26, cn0: 270
[00:29:03.984,985] <inf> main: Searching... N. Satellites: 2
[00:29:04.985,198] <inf> main: sv: 20, cn0: 150
[00:29:04.985,229] <inf> main: sv: 26, cn0: 270
[00:29:04.985,229] <inf> main: Searching... N. Satellites: 2
[00:29:05.985,748] <inf> main: sv: 20, cn0: 150
[00:29:05.985,748] <inf> main: sv: 26, cn0: 270
[00:29:05.985,778] <inf> main: Searching... N. Satellites: 2
[00:29:06.985,931] <inf> main: sv: 20, cn0: 150
[00:29:06.985,961] <inf> main: sv: 26, cn0: 270
[00:29:06.985,992] <inf> main: Searching... N. Satellites: 2
[00:29:07.986,206] <inf> main: sv: 20, cn0: 150
[00:29:07.986,206] <inf> main: sv: 26, cn0: 270
[00:29:07.986,236] <inf> main: Searching... N. Satellites: 2
[00:29:08.986,999] <inf> main: sv: 20, cn0: 150
[00:29:08.987,030] <inf> main: sv: 26, cn0: 270
[00:29:08.987,030] <inf> main: Searching... N. Satellites: 2
[00:29:09.987,213] <inf> main: sv: 20, cn0: 150
[00:29:09.987,243] <inf> main: sv: 26, cn0: 270
[00:29:09.987,243] <inf> main: Searching... N. Satellites: 2
[00:29:10.931,457] <inf> main: Satellites Power: 
[00:29:10.931,762] <inf> main: sv: 20, cn0: 150
[00:29:10.932,067] <inf> main: sv: 26, cn0: 270



// 2º search //
[00:30:05.962,158] <inf> main: sv: 20, cn0: 150
[00:30:05.962,158] <inf> main: sv: 26, cn0: 270
[00:30:05.962,188] <inf> main: Searching... N. Satellites: 2
[00:30:06.962,799] <inf> main: Searching... N. Satellites: 0
[00:30:07.963,806] <inf> main: Searching... N. Satellites: 0
[00:30:08.964,874] <inf> main: Searching... N. Satellites: 0
[00:30:09.965,423] <inf> main: Searching... N. Satellites: 0
[00:30:10.965,850] <inf> main: Searching... N. Satellites: 0
[00:30:11.966,186] <inf> main: Searching... N. Satellites: 0
[00:30:12.966,857] <inf> main: Searching... N. Satellites: 0
[00:30:13.967,102] <inf> main: Searching... N. Satellites: 0
[00:30:14.967,468] <inf> main: Searching... N. Satellites: 0
[00:30:15.967,956] <inf> main: Searching... N. Satellites: 0
[00:30:16.968,505] <inf> main: Searching... N. Satellites: 0
[00:30:17.969,055] <inf> main: Searching... N. Satellites: 0
[00:30:18.969,543] <inf> main: Searching... N. Satellites: 0
[00:30:19.969,726] <inf> main: Searching... N. Satellites: 0
[00:30:20.969,787] <inf> main: Searching... N. Satellites: 0
[00:30:21.970,794] <inf> main: Searching... N. Satellites: 0
[00:30:22.971,343] <inf> main: Searching... N. Satellites: 0
[00:30:23.971,405] <inf> main: Searching... N. Satellites: 0
[00:30:24.971,893] <inf> main: Searching... N. Satellites: 0
[00:30:25.972,381] <inf> main: Searching... N. Satellites: 0
[00:30:26.972,473] <inf> main: Searching... N. Satellites: 0
[00:30:27.972,656] <inf> main: Searching... N. Satellites: 0
[00:30:28.973,114] <inf> main: Searching... N. Satellites: 0
[00:30:29.973,327] <inf> main: Searching... N. Satellites: 0
[00:30:30.973,968] <inf> main: Searching... N. Satellites: 0
[00:30:31.974,182] <inf> main: Searching... N. Satellites: 0
[00:30:32.974,365] <inf> main: Searching... N. Satellites: 0
[00:30:33.974,578] <inf> main: Searching... N. Satellites: 0
[00:30:34.975,402] <inf> main: Searching... N. Satellites: 0
[00:30:35.975,891] <inf> main: sv: 26, cn0: 260
[00:30:35.975,921] <inf> main: Searching... N. Satellites: 1
[00:30:36.976,135] <inf> main: sv: 26, cn0: 260
[00:30:36.976,165] <inf> main: Searching... N. Satellites: 1
[00:30:37.976,409] <inf> main: sv: 26, cn0: 260
[00:30:37.976,409] <inf> main: Searching... N. Satellites: 1
[00:30:38.976,745] <inf> main: sv: 26, cn0: 260
[00:30:38.976,776] <inf> main: Searching... N. Satellites: 1
[00:30:39.977,020] <inf> main: sv: 26, cn0: 260
[00:30:39.977,020] <inf> main: Searching... N. Satellites: 1
[00:30:40.977,325] <inf> main: sv: 26, cn0: 260
[00:30:40.977,355] <inf> main: Searching... N. Satellites: 1
[00:30:41.977,935] <inf> main: sv: 26, cn0: 260
[00:30:41.977,935] <inf> main: Searching... N. Satellites: 1
[00:30:42.978,088] <inf> main: sv: 26, cn0: 260
[00:30:42.978,118] <inf> main: Searching... N. Satellites: 1
[00:30:43.978,271] <inf> main: sv: 26, cn0: 260
[00:30:43.978,302] <inf> main: Searching... N. Satellites: 1
[00:30:44.978,607] <inf> main: sv: 26, cn0: 260
[00:30:44.978,637] <inf> main: Searching... N. Satellites: 1
[00:30:45.978,851] <inf> main: sv: 26, cn0: 260
[00:30:45.978,851] <inf> main: Searching... N. Satellites: 1
[00:30:46.978,973] <inf> main: sv: 26, cn0: 260
[00:30:46.979,034] <inf> main: Searching... N. Satellites: 1
[00:30:47.979,370] <inf> main: sv: 26, cn0: 260
[00:30:47.979,400] <inf> main: Searching... N. Satellites: 1
[00:30:48.980,438] <inf> main: sv: 26, cn0: 260
[00:30:48.980,468] <inf> main: Searching... N. Satellites: 1
[00:30:49.980,499] <inf> main: sv: 26, cn0: 260
[00:30:49.980,499] <inf> main: Searching... N. Satellites: 1
[00:30:50.980,682] <inf> main: sv: 26, cn0: 280
[00:30:50.980,712] <inf> main: Searching... N. Satellites: 1
[00:30:51.981,201] <inf> main: sv: 26, cn0: 280
[00:30:51.981,201] <inf> main: Searching... N. Satellites: 1
[00:30:52.981,231] <inf> main: sv: 26, cn0: 280
[00:30:52.981,262] <inf> main: Searching... N. Satellites: 1
[00:30:53.981,628] <inf> main: sv: 26, cn0: 280
[00:30:53.981,628] <inf> main: Searching... N. Satellites: 1
[00:30:54.982,025] <inf> main: sv: 26, cn0: 280
[00:30:54.982,055] <inf> main: Searching... N. Satellites: 1
[00:30:55.982,116] <inf> main: sv: 26, cn0: 280
[00:30:55.982,116] <inf> main: Searching... N. Satellites: 1
[00:30:56.982,574] <inf> main: sv: 26, cn0: 280
[00:30:56.982,604] <inf> main: Searching... N. Satellites: 1
[00:30:57.982,849] <inf> main: sv: 26, cn0: 280
[00:30:57.982,849] <inf> main: Searching... N. Satellites: 1
[00:30:58.983,398] <inf> main: sv: 26, cn0: 280
[00:30:58.983,428] <inf> main: Searching... N. Satellites: 1
[00:30:59.983,551] <inf> main: sv: 26, cn0: 280
[00:30:59.983,551] <inf> main: Searching... N. Satellites: 1
[00:31:00.983,825] <inf> main: sv: 26, cn0: 280
[00:31:00.983,856] <inf> main: Searching... N. Satellites: 1
[00:31:01.984,039] <inf> main: sv: 26, cn0: 280
[00:31:01.984,069] <inf> main: Searching... N. Satellites: 1
[00:31:02.984,680] <inf> main: sv: 26, cn0: 280
[00:31:02.984,710] <inf> main: Searching... N. Satellites: 1
[00:31:03.984,771] <inf> main: sv: 26, cn0: 230
[00:31:03.984,771] <inf> main: Searching... N. Satellites: 1
[00:31:04.985,046] <inf> main: sv: 26, cn0: 230
[00:31:04.985,076] <inf> main: Searching... N. Satellites: 1
[00:31:05.985,351] <inf> main: sv: 26, cn0: 230
[00:31:05.985,382] <inf> main: Searching... N. Satellites: 1
[00:31:06.985,473] <inf> main: sv: 26, cn0: 230
[00:31:06.985,504] <inf> main: Searching... N. Satellites: 1
[00:31:07.985,748] <inf> main: sv: 26, cn0: 230
[00:31:07.985,748] <inf> main: Searching... N. Satellites: 1
[00:31:08.986,145] <inf> main: sv: 26, cn0: 230
[00:31:08.986,175] <inf> main: Searching... N. Satellites: 1
[00:31:09.986,236] <inf> main: sv: 26, cn0: 230
[00:31:09.986,267] <inf> main: Searching... N. Satellites: 1
[00:31:10.931,945] <inf> main: Satellites Power: 
[00:31:10.932,220] <inf> main: sv: 26, cn0: 230



// 3º search //
[00:32:05.962,371] <inf> main: sv: 26, cn0: 230
[00:32:05.962,371] <inf> main: Searching... N. Satellites: 1
[00:32:06.963,012] <inf> main: Searching... N. Satellites: 0
[00:32:07.964,019] <inf> main: Searching... N. Satellites: 0
[00:32:08.965,087] <inf> main: Searching... N. Satellites: 0
[00:32:09.965,362] <inf> main: Searching... N. Satellites: 0
[00:32:10.965,820] <inf> main: Searching... N. Satellites: 0
[00:32:11.966,156] <inf> main: Searching... N. Satellites: 0
[00:32:12.966,827] <inf> main: Searching... N. Satellites: 0
[00:32:13.967,071] <inf> main: Searching... N. Satellites: 0
[00:32:14.967,437] <inf> main: Searching... N. Satellites: 0
[00:32:15.967,926] <inf> main: Searching... N. Satellites: 0
[00:32:16.968,475] <inf> main: Searching... N. Satellites: 0
[00:32:17.969,055] <inf> main: Searching... N. Satellites: 0
[00:32:18.969,268] <inf> main: Searching... N. Satellites: 0
[00:32:19.969,696] <inf> main: Searching... N. Satellites: 0
[00:32:20.969,757] <inf> main: Searching... N. Satellites: 0
[00:32:21.970,764] <inf> main: Searching... N. Satellites: 0
[00:32:22.971,374] <inf> main: Searching... N. Satellites: 0
[00:32:23.971,618] <inf> main: Searching... N. Satellites: 0
[00:32:24.971,984] <inf> main: Searching... N. Satellites: 0
[00:32:25.972,229] <inf> main: Searching... N. Satellites: 0
[00:32:26.972,351] <inf> main: Searching... N. Satellites: 0
[00:32:27.972,412] <inf> main: Searching... N. Satellites: 0
[00:32:28.972,961] <inf> main: Searching... N. Satellites: 0
[00:32:29.973,480] <inf> main: Searching... N. Satellites: 0
[00:32:30.973,754] <inf> main: Searching... N. Satellites: 0
[00:32:31.973,907] <inf> main: Searching... N. Satellites: 0
[00:32:32.974,334] <inf> main: Searching... N. Satellites: 0
[00:32:33.974,639] <inf> main: Searching... N. Satellites: 0
[00:32:34.975,189] <inf> main: Searching... N. Satellites: 0
[00:32:35.975,555] <inf> main: Searching... N. Satellites: 0
[00:32:36.976,318] <inf> main: Searching... N. Satellites: 0
[00:32:37.976,806] <inf> main: Searching... N. Satellites: 0
[00:32:38.977,050] <inf> main: Searching... N. Satellites: 0
[00:32:39.977,569] <inf> main: Searching... N. Satellites: 0
[00:32:40.977,813] <inf> main: Searching... N. Satellites: 0
[00:32:41.978,332] <inf> main: Searching... N. Satellites: 0
[00:32:42.978,942] <inf> main: Searching... N. Satellites: 0
[00:32:43.979,400] <inf> main: Searching... N. Satellites: 0
[00:32:44.979,797] <inf> main: Searching... N. Satellites: 0
[00:32:45.980,285] <inf> main: Searching... N. Satellites: 0
[00:32:46.980,987] <inf> main: Searching... N. Satellites: 0
[00:32:47.981,262] <inf> main: Searching... N. Satellites: 0
[00:32:48.981,536] <inf> main: Searching... N. Satellites: 0
[00:32:49.982,177] <inf> main: Searching... N. Satellites: 0
[00:32:50.982,299] <inf> main: Searching... N. Satellites: 0
[00:32:51.982,635] <inf> main: Searching... N. Satellites: 0
[00:32:52.982,940] <inf> main: Searching... N. Satellites: 0
[00:32:53.983,245] <inf> main: Searching... N. Satellites: 0
[00:32:54.983,764] <inf> main: Searching... N. Satellites: 0
[00:32:55.983,703] <inf> main: Searching... N. Satellites: 0
[00:32:56.983,947] <inf> main: Searching... N. Satellites: 0
[00:32:57.984,191] <inf> main: Searching... N. Satellites: 0
[00:32:58.984,863] <inf> main: Searching... N. Satellites: 0
[00:32:59.985,137] <inf> main: Searching... N. Satellites: 0
[00:33:00.985,290] <inf> main: Searching... N. Satellites: 0
[00:33:01.985,717] <inf> main: Searching... N. Satellites: 0
[00:33:02.986,022] <inf> main: Searching... N. Satellites: 0
[00:33:03.986,541] <inf> main: Searching... N. Satellites: 0
[00:33:04.986,816] <inf> main: Searching... N. Satellites: 0
[00:33:05.987,365] <inf> main: Searching... N. Satellites: 0
[00:33:06.987,915] <inf> main: Searching... N. Satellites: 0
[00:33:07.988,464] <inf> main: Searching... N. Satellites: 0
[00:33:08.988,891] <inf> main: Searching... N. Satellites: 0
[00:33:09.989,227] <inf> main: Searching... N. Satellites: 0



// 4º search //
[00:38:05.962,188] <inf> main: Searching... N. Satellites: 0
[00:38:06.962,829] <inf> main: Searching... N. Satellites: 0
[00:38:07.963,836] <inf> main: Searching... N. Satellites: 0
[00:38:08.964,904] <inf> main: Searching... N. Satellites: 0
[00:38:09.965,179] <inf> main: Searching... N. Satellites: 0
[00:38:10.965,606] <inf> main: Searching... N. Satellites: 0
[00:38:11.965,942] <inf> main: Searching... N. Satellites: 0
[00:38:12.966,613] <inf> main: Searching... N. Satellites: 0
[00:38:13.966,888] <inf> main: Searching... N. Satellites: 0
[00:38:14.967,254] <inf> main: Searching... N. Satellites: 0
[00:38:15.967,773] <inf> main: Searching... N. Satellites: 0
[00:38:16.968,353] <inf> main: Searching... N. Satellites: 0
[00:38:17.968,902] <inf> main: Searching... N. Satellites: 0
[00:38:18.969,116] <inf> main: Searching... N. Satellites: 0
[00:38:19.969,543] <inf> main: Searching... N. Satellites: 0
[00:38:20.969,604] <inf> main: Searching... N. Satellites: 0
[00:38:21.970,611] <inf> main: Searching... N. Satellites: 0
[00:38:22.971,160] <inf> main: Searching... N. Satellites: 0
[00:38:23.971,435] <inf> main: Searching... N. Satellites: 0
[00:38:24.971,771] <inf> main: Searching... N. Satellites: 0
[00:38:25.972,076] <inf> main: Searching... N. Satellites: 0
[00:38:26.972,167] <inf> main: Searching... N. Satellites: 0
[00:38:27.972,229] <inf> main: Searching... N. Satellites: 0
[00:38:28.972,808] <inf> main: Searching... N. Satellites: 0
[00:38:29.973,358] <inf> main: Searching... N. Satellites: 0
[00:38:30.973,602] <inf> main: Searching... N. Satellites: 0
[00:38:31.973,754] <inf> main: Searching... N. Satellites: 0
[00:38:32.974,182] <inf> main: Searching... N. Satellites: 0
[00:38:33.974,456] <inf> main: Searching... N. Satellites: 0
[00:38:34.975,067] <inf> main: Searching... N. Satellites: 0
[00:38:35.975,433] <inf> main: sv: 18, cn0: 210
[00:38:35.975,463] <inf> main: Searching... N. Satellites: 1
[00:38:36.976,226] <inf> main: sv: 18, cn0: 210
[00:38:36.976,257] <inf> main: Searching... N. Satellites: 1
[00:38:37.976,654] <inf> main: sv: 18, cn0: 210
[00:38:37.976,654] <inf> main: Searching... N. Satellites: 1
[00:38:38.976,898] <inf> main: sv: 18, cn0: 210
[00:38:38.976,959] <inf> main: Searching... N. Satellites: 1
[00:38:39.977,447] <inf> main: sv: 18, cn0: 210
[00:38:39.977,447] <inf> main: Searching... N. Satellites: 1
[00:38:40.977,630] <inf> main: sv: 18, cn0: 210
[00:38:40.977,661] <inf> main: Searching... N. Satellites: 1
[00:38:41.978,118] <inf> main: sv: 18, cn0: 210
[00:38:41.978,149] <inf> main: Searching... N. Satellites: 1
[00:38:42.978,820] <inf> main: sv: 18, cn0: 210
[00:38:42.978,851] <inf> main: Searching... N. Satellites: 1
[00:38:43.979,217] <inf> main: sv: 18, cn0: 210
[00:38:43.979,217] <inf> main: Searching... N. Satellites: 1
[00:38:44.979,583] <inf> main: sv: 18, cn0: 210
[00:38:44.979,614] <inf> main: Searching... N. Satellites: 1
[00:38:45.980,133] <inf> main: sv: 18, cn0: 210
[00:38:45.980,133] <inf> main: Searching... N. Satellites: 1
[00:38:46.980,773] <inf> main: sv: 18, cn0: 210
[00:38:46.980,804] <inf> main: Searching... N. Satellites: 1
[00:38:47.981,048] <inf> main: sv: 18, cn0: 210
[00:38:47.981,048] <inf> main: Searching... N. Satellites: 1
[00:38:48.981,384] <inf> main: sv: 18, cn0: 210
[00:38:48.981,414] <inf> main: Searching... N. Satellites: 1
[00:38:49.981,597] <inf> main: sv: 18, cn0: 210
[00:38:49.981,597] <inf> main: Searching... N. Satellites: 1
[00:38:50.982,238] <inf> main: sv: 18, cn0: 230
[00:38:50.982,269] <inf> main: Searching... N. Satellites: 1
[00:38:51.982,604] <inf> main: sv: 18, cn0: 230
[00:38:51.982,604] <inf> main: Searching... N. Satellites: 1
[00:38:52.982,940] <inf> main: sv: 18, cn0: 230
[00:38:52.982,971] <inf> main: Searching... N. Satellites: 1
[00:38:53.983,184] <inf> main: sv: 18, cn0: 230
[00:38:53.983,184] <inf> main: Searching... N. Satellites: 1
[00:38:54.983,459] <inf> main: sv: 18, cn0: 230
[00:38:54.983,489] <inf> main: Searching... N. Satellites: 1
[00:38:55.983,673] <inf> main: sv: 18, cn0: 230
[00:38:55.983,673] <inf> main: Searching... N. Satellites: 1
[00:38:56.983,886] <inf> main: sv: 18, cn0: 230
[00:38:56.983,917] <inf> main: Searching... N. Satellites: 1
[00:38:57.984,191] <inf> main: sv: 18, cn0: 230
[00:38:57.984,191] <inf> main: Searching... N. Satellites: 1
[00:38:58.984,771] <inf> main: sv: 18, cn0: 230
[00:38:58.984,802] <inf> main: Searching... N. Satellites: 1
[00:38:59.985,076] <inf> main: sv: 18, cn0: 230
[00:38:59.985,076] <inf> main: Searching... N. Satellites: 1
[00:39:00.985,198] <inf> main: sv: 18, cn0: 230
[00:39:00.985,229] <inf> main: Searching... N. Satellites: 1
[00:39:01.985,595] <inf> main: sv: 18, cn0: 230
[00:39:01.985,626] <inf> main: Searching... N. Satellites: 1
[00:39:02.986,114] <inf> main: sv: 18, cn0: 230
[00:39:02.986,145] <inf> main: Searching... N. Satellites: 1
[00:39:03.986,572] <inf> main: sv: 18, cn0: 150
[00:39:03.986,572] <inf> main: Searching... N. Satellites: 1
[00:39:04.986,877] <inf> main: sv: 18, cn0: 150
[00:39:04.986,907] <inf> main: Searching... N. Satellites: 1
[00:39:05.987,426] <inf> main: sv: 18, cn0: 150
[00:39:05.987,426] <inf> main: Searching... N. Satellites: 1
[00:39:06.987,945] <inf> main: sv: 18, cn0: 150
[00:39:06.987,976] <inf> main: Searching... N. Satellites: 1
[00:39:07.988,464] <inf> main: sv: 18, cn0: 150
[00:39:07.988,464] <inf> main: Searching... N. Satellites: 1
[00:39:08.988,891] <inf> main: sv: 18, cn0: 150
[00:39:08.988,922] <inf> main: Searching... N. Satellites: 1
[00:39:09.989,257] <inf> main: sv: 18, cn0: 150
[00:39:09.989,288] <inf> main: Searching... N. Satellites: 1
[00:39:10.932,128] <inf> main: Satellites Power: 
[00:39:10.932,464] <inf> main: sv: 18, cn0: 150

Sometimes no satellite is found during the search time. All tests were performed with the board located in the same place.

What could be the problem? Any suggestions?

Thanks,
GoncaloS

[Hakon]

Hello,

where are you testing this? The device needs to be outside for the GNSS to function optimally.

[GoncaloS]

Hello, 

I used the board inside a building. This comportment (delay in detect satellites) is normal when I test inside a buildind ? Why is it that when search begins, some satellites appear and then no satellites are detected for a some time?

Thanks, 
GoncaloS

[Hakon]

The satellites are moving, so it could be that they are moving in and out of reach and the signal strength will vary for each satellite.