PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/10/27-06:27:50
G07     348.6          62.7                2.6 +/-    0.66       2.9 +/-    0.66  0.070 / 0.140
G08     82.9           51.8                5.4 +/-    0.60       6.7 +/-    0.60  0.060 / 0.120
G09     182.7          64.5                5.3 +/-    1.81       5.8 +/-    1.81  0.050 / 0.090
G11     139.6          17.9                6.2 +/-    1.24      14.5 +/-    1.24  0.060 / 0.100
G23     158.3          35.0                6.2 +/-    1.81       9.8 +/-    1.81  0.040 / 0.040
G27     47.7           26.1                2.9 +/-    1.65       5.5 +/-    1.65  0.040 / 0.040
G28     244.6          36.3                6.8 +/-    1.03      10.6 +/-    1.03  0.030 / 0.030
G30     308.3          40.2                2.2 +/-    1.54       3.2 +/-    1.54  0.040 / 0.040