PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/16-20:58:00
G01     94.8           30.7               13.0 +/-    1.03      22.5 +/-    1.03  0.210 / 0.420
G07     121.5          49.4               13.5 +/-    0.62      17.2 +/-    0.62  0.220 / 0.120
G08     42.2           14.3                9.1 +/-    3.44      23.0 +/-    3.44  0.060 / 0.050
G11     75.4           42.1               12.6 +/-    1.06      17.7 +/-    1.06  0.080 / 0.040
G13     299.3          34.3               10.5 +/-    1.22      16.9 +/-    1.22  0.070 / 0.130
G17     212.8          44.8               13.2 +/-    1.24      17.8 +/-    1.24  0.070 / 0.150
G18     68.4           24.7               11.1 +/-    1.78      21.9 +/-    1.78  0.030 / 0.010
G19     213.1          22.8               16.4 +/-    2.00      33.7 +/-    2.00  0.030 / 0.010
G28     342.2          61.9               10.9 +/-    0.48      12.2 +/-    0.48  0.040 / 0.020
G30     93.5           76.8               12.3 +/-    0.44      12.6 +/-    0.44  0.040 / 0.020