PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/13-18:27:50
G01     113.5          21.9               13.7 +/-    2.01      28.8 +/-    2.01  0.060 / 0.160
G07     94.5           63.4               13.9 +/-    0.30      15.3 +/-    0.30  0.050 / 0.110
G08     43.5           28.4                9.7 +/-    2.17      17.6 +/-    2.17  0.030 / 0.030
G09     176.2          19.9               16.7 +/-    2.10      36.9 +/-    2.10  0.030 / 0.030
G11     99.7           42.1               12.2 +/-    0.91      17.1 +/-    0.91  0.030 / 0.040
G13     314.4          24.0               11.1 +/-    1.26      22.2 +/-    1.26  0.030 / 0.040
G17     204.4          27.9               17.0 +/-    1.22      31.2 +/-    1.22  0.110 / 0.180
G18     88.0           23.0               11.0 +/-    1.09      22.6 +/-    1.09  0.110 / 0.220
G28     305.2          59.6               12.1 +/-    0.87      13.8 +/-    0.87  0.050 / 0.050
G30     3.7            74.2               14.1 +/-    0.99      14.6 +/-    0.99  0.040 / 0.050