PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/25-16:57:30
G01     42.3           17.6                9.6 +/-    1.38      22.4 +/-    1.38  0.140 / 0.250
G06     175.1          37.3               14.6 +/-    8.30      22.3 +/-    8.30  0.090 / 0.230
G13     241.4          23.5               14.4 +/-    1.51      29.1 +/-    1.51  0.070 / 0.230
G15     276.5          12.9               11.7 +/-    1.03      30.6 +/-    1.03  0.090 / 0.210
G17     4.3            70.5               14.9 +/-    7.54      15.7 +/-    7.54  0.080 / 0.110
G19     275.9          69.9                9.6 +/-   20.57      10.2 +/-   20.57  0.080 / 0.090
G24     317.9          16.0                6.3 +/-   12.20      15.3 +/-   12.20  0.210 / 0.340
G28     69.0           47.8               11.7 +/-    2.38      15.2 +/-    2.38  0.420 / 0.250
G30     154.3          32.0               13.9 +/-    1.69      23.3 +/-    1.69  0.030 / 0.020