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               10.3 +/-    0.78      10.9 +/-    0.78  0.090 / 0.100
G08     56.6           45.5                9.5 +/-    1.01      12.7 +/-    1.01  0.070 / 0.080
G09     179.8          42.8               12.0 +/-    0.57      16.7 +/-    0.57  0.040 / 0.040
G11     126.8          31.3               10.8 +/-    1.52      18.5 +/-    1.52  0.040 / 0.040
G23     160.0          11.4               11.7 +/-    1.65      31.8 +/-    1.65  0.290 / 0.180
G27     37.9           10.7                8.5 +/-    1.50      23.4 +/-    1.50  0.070 / 0.340
G28     269.2          50.5               10.3 +/-    2.76      12.9 +/-    2.76  0.030 / 0.030
G30     332.9          59.7                8.6 +/-    0.49       9.8 +/-    0.49  0.020 / 0.030