PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/27-01:57:50
G07     32.6           68.8                4.5 +/-    0.79       4.8 +/-    0.79  0.030 / 0.030
G08     57.0           43.9                4.3 +/-    0.54       5.9 +/-    0.54  0.030 / 0.040
G09     177.6          44.6                9.2 +/-    1.69      12.4 +/-    1.69  0.090 / 0.150
G11     125.4          30.4                8.8 +/-    1.50      15.3 +/-    1.50  0.090 / 0.160
G18     108.3          12.1                3.7 +/-   16.23       9.9 +/-   16.23  0.050 / 0.090
G23     161.3          18.4                8.1 +/-    1.44      18.6 +/-    1.44  0.040 / 0.080
G27     40.3           17.0                2.5 +/-    1.44       5.8 +/-    1.44  0.110 / 0.390
G28     261.0          45.5                3.7 +/-    0.92       4.9 +/-    0.92  0.130 / 0.410
G30     321.9          52.1                5.3 +/-    1.30       6.5 +/-    1.30  0.040 / 0.060