PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-12:58:10
G07     358.4          65.3                5.3 +/-    0.81       5.8 +/-    0.81  0.070 / 0.070
G08     73.3           51.1                8.1 +/-    0.51      10.1 +/-    0.51  0.060 / 0.100
G09     179.4          56.2                7.7 +/-    1.28       9.0 +/-    1.28  0.090 / 0.130
G11     135.4          22.8                8.8 +/-    1.11      18.1 +/-    1.11  0.090 / 0.140
G23     158.8          25.5                8.1 +/-    1.03      15.7 +/-    1.03  0.080 / 0.210
G27     44.1           22.7                6.0 +/-    2.10      12.3 +/-    2.10  0.100 / 0.270
G28     250.6          40.4                8.3 +/-    1.51      11.9 +/-    1.51  0.040 / 0.040
G30     313.3          44.5                6.5 +/-    1.26       8.8 +/-    1.26  0.040 / 0.040