PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/22-14:28:10
G01     116.8          19.3               11.8 +/-    3.12      26.5 +/-    3.12  0.090 / 0.290
G07     90.5           62.0                9.3 +/-    0.49      10.4 +/-    0.49  0.100 / 0.320
G08     43.8           27.7                5.2 +/-    1.73       9.5 +/-    1.73  0.040 / 0.040
G09     175.5          22.6                9.5 +/-    1.64      19.7 +/-    1.64  0.050 / 0.030
G11     100.4          39.0                9.5 +/-    0.80      14.1 +/-    0.80  0.060 / 0.120
G13     317.6          19.4                7.1 +/-    1.30      15.8 +/-    1.30  0.070 / 0.090
G17     201.5          29.2               10.4 +/-    1.66      18.6 +/-    1.66  0.020 / 0.040
G28     297.1          58.0                7.3 +/-    1.26       8.5 +/-    1.26  0.030 / 0.040
G30     345.8          68.4                6.9 +/-    0.92       7.4 +/-    0.92  0.060 / 0.150