PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/11-14:12:40
G01     90.5           31.0                5.7 +/-    1.82       9.8 +/-    1.82  0.040 / 0.050
G07     124.9          42.5                7.4 +/-    0.57      10.3 +/-    0.57  0.040 / 0.040
G08     42.2           10.8                6.1 +/-    3.04      16.7 +/-    3.04  0.060 / 0.090
G11     69.4           40.9                5.9 +/-    1.33       8.4 +/-    1.33  0.080 / 0.080
G13     295.1          36.7                5.2 +/-    2.59       7.9 +/-    2.59  0.050 / 0.050
G17     213.1          49.5                8.8 +/-    0.52      11.1 +/-    0.52  0.040 / 0.090
G19     213.1          27.3                7.2 +/-    0.81      13.3 +/-    0.81  0.050 / 0.050
G28     333.7          61.2                5.0 +/-    0.73       5.6 +/-    0.73  0.050 / 0.050
G30     103.7          75.5                5.9 +/-    1.06       6.1 +/-    1.06  0.170 / 0.190