46.393848	173.831761	signals, strong
176.460637	254.951375	signals
256.829144	298.265244	signals
973.385740	1009.251125	signals around 725
1312.385611	1347.312112	signals, around 730
1683.307552	1787.210763	signals, around 738
1811.246204	1855.311180	signals