PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/22-11:12:30
G07     357.4          64.8                4.3 +/-    0.72       4.7 +/-    0.72  0.040 / 0.030
G08     86.7           53.7                5.0 +/-    1.00       6.1 +/-    1.00  0.040 / 0.040
G09     183.8          63.9                4.6 +/-    0.97       5.1 +/-    0.97  0.090 / 0.110
G11     139.4          20.3                4.6 +/-    2.02      10.1 +/-    2.02  0.270 / 0.100
G23     156.7          27.6                4.4 +/-    1.91       8.2 +/-    1.91  0.070 / 0.150
G27     47.6           26.5                3.0 +/-    1.80       5.6 +/-    1.80  0.110 / 0.140
G28     243.1          31.3                5.9 +/-    1.00      10.1 +/-    1.00  0.030 / 0.030
G30     310.4          42.8                4.6 +/-    1.04       6.4 +/-    1.04  0.030 / 0.030