PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/30-07:12:30
G07     341.1          60.8                4.8 +/-    0.60       5.4 +/-    0.60  0.030 / 0.040
G08     88.1           51.7                6.0 +/-    1.23       7.4 +/-    1.23  0.040 / 0.040
G09     175.7          63.7                8.0 +/-    0.62       8.8 +/-    0.62  0.090 / 0.090
G11     141.8          16.5                6.5 +/-    2.13      15.6 +/-    2.13  0.080 / 0.120
G23     157.4          38.5                6.9 +/-    1.14      10.3 +/-    1.14  0.070 / 0.090
G27     52.2           30.4                4.9 +/-    0.76       8.5 +/-    0.76  0.080 / 0.100
G28     240.4          31.9                6.5 +/-    1.92      11.0 +/-    1.92  0.050 / 0.090
G30     304.4          36.5                4.9 +/-    1.36       7.5 +/-    1.36  0.050 / 0.080