PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/27-21:43:10
G07     332.5          57.7                9.1 +/-    0.70      10.6 +/-    0.70  0.090 / 0.140
G08     103.3          52.5                9.6 +/-    0.90      11.7 +/-    0.90  0.150 / 0.190
G09     194.9          74.4               11.8 +/-    0.41      12.3 +/-    0.41  0.050 / 0.090
G11     148.3          12.2               14.9 +/-   11.64      39.5 +/-   11.64  0.090 / 0.110
G23     154.9          39.7               12.2 +/-    0.94      17.8 +/-    0.94  0.030 / 0.040
G27     54.3           31.0                7.5 +/-    1.73      12.9 +/-    1.73  0.040 / 0.050
G28     237.7          30.3               12.4 +/-    1.47      21.6 +/-    1.47  0.170 / 0.320
G30     304.4          38.4                8.9 +/-    1.44      13.4 +/-    1.44  0.160 / 0.310