PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-07:43:00
G01     120.7          16.6                7.4 +/-    1.03      17.6 +/-    1.03  0.040 / 0.060
G07     77.5           66.3                6.3 +/-    0.30       6.8 +/-    0.30  0.040 / 0.050
G08     45.5           32.0                3.5 +/-    0.58       5.9 +/-    0.58  0.100 / 0.330
G09     176.8          27.6                7.9 +/-    1.79      14.5 +/-    1.79  0.130 / 0.270
G11     108.4          38.2                8.0 +/-    0.62      12.0 +/-    0.62  0.030 / 0.040
G13     319.4          16.2                1.4 +/-    1.90       3.5 +/-    1.90  0.020 / 0.030
G17     200.7          24.4                4.8 +/-    2.24       9.6 +/-    2.24  0.120 / 0.140
G28     290.1          56.8                4.7 +/-    0.73       5.5 +/-    0.73  0.070 / 0.120
G30     343.3          66.6                2.4 +/-    0.66       2.6 +/-    0.66  0.090 / 0.210