PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/08/27-10:27:40
G07     38.8           69.6                2.8 +/-    0.71       3.0 +/-    0.71  0.030 / 0.040
G08     52.9           40.9                2.3 +/-    0.84       3.3 +/-    0.84  0.040 / 0.040
G09     176.4          38.5                2.6 +/-    1.43       3.9 +/-    1.43  0.040 / 0.040
G11     121.4          32.8                2.0 +/-    1.08       3.3 +/-    1.08  0.020 / 0.030
G17     198.7          12.0               -4.5 +/-   11.19     -11.9 +/-   11.19  0.150 / 0.250
G18     107.3          14.3                2.7 +/-    2.31       6.8 +/-    2.31  0.200 / 0.230
G23     161.1          13.0                2.0 +/-    2.01       5.1 +/-    2.01  0.180 / 0.250
G27     38.1           11.3                2.0 +/-    3.22       5.5 +/-    3.22  0.160 / 0.310
G28     268.8          50.1                1.4 +/-    3.26       1.8 +/-    3.26  0.160 / 0.350
G30     325.7          55.1                1.9 +/-    0.48       2.2 +/-    0.48  0.160 / 0.340