PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/01-22:12:50
G01     87.3           32.4               14.0 +/-    0.49      23.4 +/-    0.49  0.060 / 0.110
G07     127.7          43.9               16.1 +/-    0.80      22.0 +/-    0.80  0.050 / 0.110
G11     68.1           40.2               12.1 +/-    0.51      17.5 +/-    0.51  0.040 / 0.080
G13     292.2          36.4               12.8 +/-    1.01      19.8 +/-    1.01  0.040 / 0.060
G15     313.4          11.3               -5.5 +/-   20.63     -15.0 +/-   20.63  0.050 / 0.050
G17     217.1          52.0               17.7 +/-    1.44      21.8 +/-    1.44  0.060 / 0.040
G18     61.9           23.6               11.5 +/-    1.19      23.3 +/-    1.19  0.040 / 0.060
G19     215.9          28.9               17.0 +/-    1.24      30.5 +/-    1.24  0.050 / 0.070
G28     355.0          61.5               12.6 +/-    1.02      14.1 +/-    1.02  0.050 / 0.090
G30     114.3          71.7               14.7 +/-    0.60      15.4 +/-    0.60  0.070 / 0.090