PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/08-17:57:40
G01     109.2          23.7               11.8 +/-    3.16      23.8 +/-    3.16  0.040 / 0.060
G07     106.9          54.0               10.7 +/-    0.52      12.9 +/-    0.52  0.040 / 0.050
G08     42.1           22.6                7.9 +/-    2.12      16.4 +/-    2.12  0.030 / 0.040
G09     176.1          17.6               11.9 +/-    1.56      27.7 +/-    1.56  0.030 / 0.030
G11     91.3           43.0               11.8 +/-    0.62      16.3 +/-    0.62  0.030 / 0.030
G13     311.3          27.7                8.4 +/-    1.74      15.4 +/-    1.74  0.030 / 0.030
G17     204.0          34.9               11.3 +/-    1.05      18.0 +/-    1.05  0.080 / 0.190
G18     81.4           23.4               10.9 +/-    2.95      22.1 +/-    2.95  0.080 / 0.160
G28     303.3          58.2                9.4 +/-    1.37      10.9 +/-    1.37  0.070 / 0.190
G30     22.4           77.3               10.4 +/-    1.21      10.6 +/-    1.21  0.060 / 0.160