PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-14:27:50
G01     109.4          23.3                9.6 +/-    1.47      19.5 +/-    1.47  0.070 / 0.050
G07     104.7          56.4               10.4 +/-    0.88      12.2 +/-    0.88  0.050 / 0.070
G08     42.6           25.0                8.8 +/-    1.82      17.2 +/-    1.82  0.040 / 0.080
G09     176.0          17.9               10.3 +/-    2.07      23.9 +/-    2.07  0.040 / 0.070
G11     93.0           43.3                9.4 +/-    0.65      13.0 +/-    0.65  0.040 / 0.040
G13     311.6          27.5                6.7 +/-    1.75      12.3 +/-    1.75  0.030 / 0.040
G17     204.3          32.2                9.8 +/-    1.66      16.4 +/-    1.66  0.070 / 0.200
G18     82.7           23.5                7.9 +/-    1.04      16.0 +/-    1.04  0.080 / 0.190
G28     300.7          57.5                7.5 +/-    1.07       8.7 +/-    1.07  0.120 / 0.200
G30     19.9           77.1                9.1 +/-    0.67       9.3 +/-    0.67  0.120 / 0.210