PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/27-17:27:50
G01     50.9           26.1                9.1 +/-    1.66      17.3 +/-    1.66  0.170 / 0.320
G06     176.9          25.3               12.4 +/-    1.25      24.0 +/-    1.25  0.130 / 0.330
G07     146.0          13.6               13.4 +/-    2.82      34.6 +/-    2.82  0.040 / 0.070
G11     44.9           15.9                7.3 +/-    2.01      17.8 +/-    2.01  0.040 / 0.070
G13     251.5          30.9               11.5 +/-    1.40      19.7 +/-    1.40  0.080 / 0.130
G15     286.4          15.3                8.6 +/-    1.92      21.2 +/-    1.92  0.060 / 0.140
G17     303.1          78.4               10.4 +/-    0.85      10.5 +/-    0.85  0.160 / 0.500
G19     243.8          56.6               11.7 +/-    0.72      13.7 +/-    0.72  0.160 / 0.550
G28     51.0           53.3                9.5 +/-    0.49      11.6 +/-    0.49  0.030 / 0.030
G30     149.4          42.7               12.7 +/-    1.22      17.7 +/-    1.22  0.020 / 0.030