PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-04:42:40
G01     125.3          13.1                7.1 +/-    1.91      18.5 +/-    1.91  0.110 / 0.070
G07     60.5           68.7                4.2 +/-    0.41       4.4 +/-    0.41  0.090 / 0.080
G08     48.8           37.5                4.1 +/-    1.30       6.1 +/-    1.30  0.050 / 0.040
G09     178.2          34.2                8.7 +/-    0.83      14.0 +/-    0.83  0.070 / 0.030
G11     116.3          35.7                6.1 +/-    1.07       9.5 +/-    1.07  0.140 / 0.310
G13     321.1          12.1                0.9 +/-    9.03       2.5 +/-    9.03  0.190 / 0.230
G17     200.0          18.1                4.6 +/-    2.17      10.7 +/-    2.17  0.240 / 0.240
G28     280.7          54.5                4.0 +/-    3.29       4.8 +/-    3.29  0.150 / 0.320
G30     337.9          63.2                3.9 +/-    0.48       4.3 +/-    0.48  0.030 / 0.030