PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/09/23-07:58:00
G01     122.1          14.0                4.3 +/-    2.27      10.9 +/-    2.27  0.030 / 0.030
G07     69.0           67.7                5.6 +/-    0.78       6.0 +/-    0.78  0.030 / 0.020
G08     48.8           38.3                4.2 +/-    1.04       6.3 +/-    1.04  0.130 / 0.160
G09     176.6          31.2                5.5 +/-    1.17       9.4 +/-    1.17  0.140 / 0.240
G11     115.7          38.5                7.2 +/-    1.31      10.8 +/-    1.31  0.100 / 0.100
G13     319.4          16.2                2.5 +/-    2.90       6.0 +/-    2.90  0.110 / 0.110
G17     200.5          17.0                3.8 +/-    1.88       9.0 +/-    1.88  0.100 / 0.230
G18     99.1           18.6                5.0 +/-    2.42      11.3 +/-    2.42  0.130 / 0.240
G28     274.2          49.3                5.2 +/-    2.57       6.6 +/-    2.57  0.040 / 0.040
G30     334.8          62.7                4.7 +/-    1.01       5.2 +/-    1.01  0.030 / 0.040