PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/13-23:13:10
G07     359.4          65.5                7.9 +/-    0.70       8.6 +/-    0.70  0.050 / 0.140
G08     75.4           52.4                8.3 +/-    1.12      10.2 +/-    1.12  0.050 / 0.130
G09     182.7          58.0                9.3 +/-    0.61      10.8 +/-    0.61  0.030 / 0.040
G11     137.8          22.1                8.2 +/-    1.66      17.1 +/-    1.66  0.040 / 0.040
G23     158.8          24.9                8.8 +/-    2.24      17.3 +/-    2.24  0.220 / 0.190
G27     43.3           21.4                7.4 +/-    1.54      15.7 +/-    1.54  0.180 / 0.260
G28     251.9          41.6                8.7 +/-    2.06      12.3 +/-    2.06  0.060 / 0.120