PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/12-06:27:50
G01     64.5           31.8                3.8 +/-    0.47       6.4 +/-    0.47  0.070 / 0.050
G07     140.3          25.5                9.1 +/-    1.44      17.6 +/-    1.44  0.060 / 0.060
G11     50.7           26.9                3.8 +/-    2.05       7.1 +/-    2.05  0.050 / 0.100
G13     269.2          36.1                7.1 +/-    1.23      11.0 +/-    1.23  0.040 / 0.100
G15     297.2          16.5                4.0 +/-    1.61       9.6 +/-    1.61  0.070 / 0.240
G17     247.6          74.6                5.9 +/-    0.64       6.1 +/-    0.64  0.070 / 0.180
G19     229.0          48.4                7.0 +/-    1.16       9.0 +/-    1.16  0.030 / 0.030
G28     30.2           57.5                3.0 +/-    0.50       3.5 +/-    0.50  0.040 / 0.030
G30     140.0          54.9                7.6 +/-    1.01       9.1 +/-    1.01  0.060 / 0.070