PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/08/12-11:42:50
G01     100.1          27.8                4.0 +/-    1.08       7.3 +/-    1.08  0.030 / 0.030
G07     115.6          51.0                6.0 +/-    0.97       7.4 +/-    0.97  0.030 / 0.030
G08     42.0           19.6                4.0 +/-    2.61       8.9 +/-    2.61  0.040 / 0.040
G11     81.6           43.7                6.8 +/-    1.02       9.4 +/-    1.02  0.050 / 0.050
G13     304.3          33.0                2.3 +/-    2.31       3.8 +/-    2.31  0.050 / 0.080
G17     208.4          38.8                6.4 +/-    1.32       9.5 +/-    1.32  0.050 / 0.120
G18     73.5           24.6                5.0 +/-    1.19       9.8 +/-    1.19  0.350 / 0.370
G19     209.7          19.5               -2.0 +/-    5.44      -4.4 +/-    5.44  0.120 / 0.210
G28     315.4          59.6                4.0 +/-    1.30       4.6 +/-    1.30  0.080 / 0.150
G30     52.8           80.0                5.3 +/-    0.37       5.3 +/-    0.37  0.090 / 0.230