PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/24-13:58:00
G01     125.3          12.8                2.5 +/-   21.53       6.5 +/-   21.53  0.120 / 0.480
G07     66.2           66.9               16.5 +/-   13.34      17.8 +/-   13.34  0.120 / 0.430
G08     48.5           36.3                1.5 +/-    8.80       2.3 +/-    8.80  0.040 / 0.050
G09     176.6          32.9                1.9 +/-   14.26       3.2 +/-   14.26  0.040 / 0.050
G11     112.9          34.9               15.0 +/-   11.00      23.8 +/-   11.00  0.100 / 0.330
G13     321.4          11.3               -2.5 +/-   15.25      -6.8 +/-   15.25  0.130 / 0.380
G17     199.4          18.9                6.9 +/-    2.87      15.6 +/-    2.87  0.030 / 0.040
G28     279.4          53.7              -28.4 +/-   59.94     -34.3 +/-   59.94  0.030 / 0.040
G30     332.1          59.7               13.5 +/-    9.14      15.3 +/-    9.14  0.060 / 0.070