PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/02/17-23:28:00
G07     35.5           69.6               11.0 +/-    0.94      11.6 +/-    0.94  0.040 / 0.060
G08     56.6           45.5                9.4 +/-    0.56      12.6 +/-    0.56  0.040 / 0.070
G09     179.8          42.8               13.1 +/-    1.36      18.2 +/-    1.36  0.050 / 0.080
G11     126.8          31.3               10.8 +/-    1.54      18.4 +/-    1.54  0.060 / 0.080
G23     160.0          11.4               11.1 +/-    3.31      30.0 +/-    3.31  0.220 / 0.410
G27     37.9           10.7                9.4 +/-    1.38      25.9 +/-    1.38  0.220 / 0.300
G28     269.2          50.5                9.6 +/-    1.06      12.1 +/-    1.06  0.030 / 0.040
G30     332.9          59.7                9.7 +/-    0.93      11.0 +/-    0.93  0.030 / 0.040