PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/21-23:58:10
G01     113.6          21.8               10.1 +/-    0.60      21.4 +/-    0.60  0.050 / 0.060
G07     94.3           63.3                8.6 +/-    0.94       9.5 +/-    0.94  0.070 / 0.060
G08     43.5           28.4                6.2 +/-    0.95      11.2 +/-    0.95  0.070 / 0.120
G09     176.8          20.9                9.0 +/-    0.88      19.5 +/-    0.88  0.080 / 0.110
G11     102.5          42.1               10.2 +/-    0.56      14.4 +/-    0.56  0.100 / 0.160
G13     314.8          23.4                5.3 +/-    1.12      10.7 +/-    1.12  0.120 / 0.150
G17     204.0          29.3               10.8 +/-    1.07      19.2 +/-    1.07  0.020 / 0.040
G28     305.7          59.7                8.3 +/-    1.10       9.5 +/-    1.10  0.030 / 0.040
G30     15.8           75.4                9.7 +/-    1.20      10.0 +/-    1.20  0.050 / 0.070