PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/15-18:42:40
G07     61.7           66.8               10.2 +/-    0.48      11.0 +/-    0.48  0.040 / 0.030
G08     51.8           40.5                9.3 +/-    1.03      13.4 +/-    1.03  0.030 / 0.030
G09     179.1          39.8               13.1 +/-    0.82      19.1 +/-    0.82  0.080 / 0.380
G11     119.2          34.8               11.1 +/-    0.80      17.6 +/-    0.80  0.100 / 0.340
G17     199.0          13.3               12.3 +/-    2.46      31.8 +/-    2.46  0.080 / 0.070
G18     103.4          15.5               10.3 +/-    1.81      25.2 +/-    1.81  0.080 / 0.090
G23     160.7          10.0               12.5 +/-    1.82      34.9 +/-    1.82  0.120 / 0.090
G27     37.8           10.5                8.0 +/-    3.05      22.1 +/-    3.05  0.130 / 0.110
G28     268.3          48.2               10.9 +/-    2.72      14.1 +/-    2.72  0.040 / 0.030
G30     332.1          60.0                9.7 +/-    0.51      11.1 +/-    0.51  0.030 / 0.040