PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/12/07-08:27:30
G02     200.2          25.4                5.0 +/-    2.64       9.6 +/-    2.64  0.130 / 0.090
G06     175.6          53.7                8.6 +/-    0.44      10.4 +/-    0.44  0.070 / 0.080
G13     226.0          11.0                4.2 +/-    2.01      11.4 +/-    2.01  0.040 / 0.040
G17     27.1           56.3                3.8 +/-    0.98       4.5 +/-    0.98  0.040 / 0.030
G19     338.6          70.1                3.2 +/-    0.35       3.4 +/-    0.35  0.070 / 0.110
G24     308.7          30.8                4.5 +/-    0.62       7.7 +/-    0.62  0.070 / 0.110
G28     92.4           37.1                5.2 +/-    1.25       8.0 +/-    1.25  0.030 / 0.030
G30     157.0          10.4                5.1 +/-    2.08      14.1 +/-    2.08  0.040 / 0.030