PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/23-18:13:10
G01     126.9          11.0               -8.2 +/-   44.03     -22.4 +/-   44.03  0.040 / 0.040
G07     66.7           66.1               11.9 +/-    0.64      12.9 +/-    0.64  0.040 / 0.050
G08     50.6           39.4               11.4 +/-    0.83      16.7 +/-    0.83  0.030 / 0.050
G09     179.0          38.0               14.0 +/-    1.06      21.1 +/-    1.06  0.040 / 0.050
G11     117.5          35.7               13.8 +/-    0.85      21.6 +/-    0.85  0.050 / 0.090
G13     320.9          12.0                4.0 +/-   26.81      10.7 +/-   26.81  0.060 / 0.080
G17     199.2          14.7               12.3 +/-    2.92      30.8 +/-    2.92  0.080 / 0.230
G18     102.0          16.3               13.7 +/-    0.95      33.1 +/-    0.95  0.070 / 0.260
G28     270.5          49.0               13.2 +/-    1.25      16.9 +/-    1.25  0.210 / 0.450
G30     334.5          61.6               11.3 +/-    0.61      12.7 +/-    0.61  0.220 / 0.350