PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-00:57:40
G01     72.7           33.1                4.9 +/-    1.28       8.1 +/-    1.28  0.040 / 0.040
G07     136.5          32.8                9.3 +/-    1.42      15.4 +/-    1.42  0.040 / 0.050
G11     57.0           34.2                5.6 +/-    1.21       9.1 +/-    1.21  0.050 / 0.060
G13     277.4          37.4                7.4 +/-    1.67      11.3 +/-    1.67  0.040 / 0.070
G15     303.3          15.4                3.7 +/-    1.26       9.2 +/-    1.26  0.040 / 0.040
G17     230.3          65.5                7.5 +/-    1.02       8.2 +/-    1.02  0.040 / 0.040
G19     223.1          40.8                7.9 +/-    1.84      11.3 +/-    1.84  0.050 / 0.070
G28     17.9           59.4                6.4 +/-    1.57       7.3 +/-    1.57  0.080 / 0.080
G30     133.6          59.2                7.2 +/-    0.39       8.2 +/-    0.39  0.080 / 0.090