PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/11-06:57:40
G01     52.6           27.0                1.0 +/-    2.39       1.9 +/-    2.39  0.040 / 0.050
G06     181.7          18.5                3.8 +/-    1.45       8.7 +/-    1.45  0.030 / 0.050
G07     145.3          14.6                5.4 +/-    3.31      13.5 +/-    3.31  0.140 / 0.250
G11     45.6           17.6                2.3 +/-    2.59       5.4 +/-    2.59  0.110 / 0.220
G13     255.1          31.8                5.6 +/-    2.79       9.5 +/-    2.79  0.020 / 0.020
G15     285.9          16.4                6.1 +/-    1.48      14.6 +/-    1.48  0.020 / 0.020
G17     304.3          79.2                4.2 +/-    0.45       4.3 +/-    0.45  0.120 / 0.230
G19     243.3          59.0                6.2 +/-    1.46       7.2 +/-    1.46  0.150 / 0.200
G28     49.2           53.5                3.3 +/-    1.13       4.0 +/-    1.13  0.170 / 0.300
G30     147.7          42.9                6.2 +/-    1.02       8.6 +/-    1.02  0.220 / 0.310