PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/04-15:58:00
G01     81.9           33.1               10.4 +/-    1.25      17.1 +/-    1.25  0.040 / 0.040
G07     131.3          39.5               11.6 +/-    1.26      17.0 +/-    1.26  0.040 / 0.040
G11     61.1           36.3                9.0 +/-    0.63      14.0 +/-    0.63  0.080 / 0.110
G13     286.1          37.6               11.2 +/-    1.22      17.0 +/-    1.22  0.080 / 0.090
G15     311.9          11.5                8.4 +/-    1.85      22.6 +/-    1.85  0.040 / 0.050
G17     220.7          59.6               12.1 +/-    0.84      13.8 +/-    0.84  0.040 / 0.060
G18     56.9           22.0                6.9 +/-    0.72      14.6 +/-    0.72  0.040 / 0.070
G19     218.2          30.9               12.2 +/-    1.95      21.0 +/-    1.95  0.040 / 0.070
G28     2.4            61.1               10.5 +/-    0.47      11.8 +/-    0.47  0.070 / 0.120
G30     121.9          71.1               12.3 +/-    1.07      12.9 +/-    1.07  0.070 / 0.110