PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/07/28-01:28:10
G10     263.9          35.5               12.3 +/-    2.39      19.3 +/-    2.39  0.250 / 0.430
G13     43.9           21.7                9.1 +/-    3.73      19.3 +/-    3.73  0.160 / 0.440
G15     64.9           52.9               10.5 +/-    2.19      12.7 +/-    2.19  0.070 / 0.080
G16     283.1          12.3               11.1 +/-    3.14      29.5 +/-    3.14  0.090 / 0.120
G18     292.3          62.4               10.9 +/-    1.73      12.1 +/-    1.73  0.040 / 0.030
G20     53.4           35.5                9.5 +/-    3.17      14.9 +/-    3.17  0.050 / 0.030
G21     355.8          70.1               10.3 +/-    2.12      10.9 +/-    2.12  0.250 / 0.330
G24     123.7          12.2               12.9 +/-    4.47      34.3 +/-    4.47  0.170 / 0.360
G27     319.0          18.2                9.8 +/-    2.59      22.6 +/-    2.59  0.060 / 0.070
G29     167.0          32.1               13.4 +/-    1.78      22.5 +/-    1.78  0.060 / 0.070