PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/09/23-07:43:00
G07     341.9          61.1                5.6 +/-    0.61       6.3 +/-    0.61  0.040 / 0.040
G08     87.2           51.7                6.1 +/-    0.83       7.5 +/-    0.83  0.050 / 0.040
G09     176.2          63.4                8.3 +/-    0.56       9.2 +/-    0.56  0.100 / 0.070
G11     141.4          16.9                5.6 +/-    2.04      13.3 +/-    2.04  0.120 / 0.090
G23     157.5          37.7                7.5 +/-    0.87      11.3 +/-    0.87  0.070 / 0.090
G27     51.6           29.9                5.0 +/-    1.03       8.7 +/-    1.03  0.080 / 0.080
G28     240.9          32.4                5.6 +/-    2.17       9.3 +/-    2.17  0.050 / 0.070
G30     304.9          37.0                3.5 +/-    1.26       5.4 +/-    1.26  0.060 / 0.070