PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/27-23:43:10
G07     328.5          56.1                8.2 +/-    1.15       9.7 +/-    1.15  0.230 / 0.450
G08     106.2          51.1               11.8 +/-    0.69      14.7 +/-    0.69  0.170 / 0.480
G09     201.7          77.4                8.5 +/-    0.92       8.7 +/-    0.92  0.040 / 0.080
G11     149.3          10.6               -0.5 +/-   26.33      -1.4 +/-   26.33  0.040 / 0.070
G16     45.8           11.1                5.4 +/-    2.46      14.7 +/-    2.46  0.030 / 0.050
G23     154.2          44.3               10.8 +/-    0.97      14.7 +/-    0.97  0.030 / 0.060
G27     57.2           32.5                7.6 +/-    0.61      12.7 +/-    0.61  0.200 / 0.560
G28     235.3          27.9               10.7 +/-    1.65      19.6 +/-    1.65  0.150 / 0.560
G30     301.7          36.2                9.5 +/-    1.15      14.7 +/-    1.15  0.050 / 0.070