PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/31-16:27:40
G01     43.7           19.3                8.5 +/-    1.14      19.0 +/-    1.14  0.130 / 0.290
G06     175.7          34.6               14.7 +/-    1.32      23.5 +/-    1.32  0.130 / 0.320
G13     243.7          25.1               13.3 +/-    1.23      26.0 +/-    1.23  0.080 / 0.150
G15     278.5          13.5               10.6 +/-    2.03      27.3 +/-    2.03  0.070 / 0.190
G17     359.1          72.5               11.6 +/-    0.59      12.1 +/-    0.59  0.060 / 0.110
G19     268.7          68.6               11.0 +/-    0.60      11.8 +/-    0.60  0.060 / 0.090
G24     318.4          13.9                9.6 +/-    1.30      24.5 +/-    1.30  0.030 / 0.030
G28     65.7           48.9               10.8 +/-    0.64      13.8 +/-    0.64  0.030 / 0.040
G30     153.5          34.4               12.2 +/-    1.61      19.5 +/-    1.61  0.070 / 0.200