PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/23-16:58:00
G01     44.4           20.1                7.5 +/-    1.16      16.4 +/-    1.16  0.090 / 0.200
G06     175.9          33.4               11.5 +/-    1.66      18.7 +/-    1.66  0.130 / 0.180
G13     244.7          25.8               12.1 +/-    1.43      23.1 +/-    1.43  0.070 / 0.110
G15     280.0          13.8                8.4 +/-    1.36      21.4 +/-    1.36  0.060 / 0.090
G17     356.1          73.4               11.2 +/-    0.82      11.6 +/-    0.82  0.050 / 0.030
G19     265.5          67.8                9.4 +/-    0.81      10.1 +/-    0.81  0.030 / 0.030
G24     318.7          12.9                8.4 +/-    2.47      21.9 +/-    2.47  0.070 / 0.170
G28     63.9           49.5               10.5 +/-    0.95      13.3 +/-    0.95  0.060 / 0.160
G30     153.1          35.8               10.4 +/-    1.05      16.3 +/-    1.05  0.070 / 0.150