PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/23-13:27:50
G01     88.1           31.5                5.0 +/-    1.14       8.5 +/-    1.14  0.040 / 0.060
G07     126.5          41.2                5.6 +/-    0.50       8.0 +/-    0.50  0.040 / 0.060
G08     42.5           9.7                 5.5 +/-    2.00      15.5 +/-    2.00  0.040 / 0.070
G11     67.4           40.3                6.3 +/-    2.01       9.1 +/-    2.01  0.050 / 0.060
G13     292.8          37.4               10.7 +/-    1.52      16.2 +/-    1.52  0.050 / 0.050
G17     214.5          50.8                7.8 +/-    0.59       9.8 +/-    0.59  0.040 / 0.060
G18     62.0           23.4                6.0 +/-    2.60      12.1 +/-    2.60  0.160 / 0.120
G19     214.0          29.2                7.5 +/-    1.74      13.4 +/-    1.74  0.100 / 0.140
G28     337.0          61.4                5.2 +/-    0.75       5.8 +/-    0.75  0.080 / 0.380
G30     108.7          74.7                6.1 +/-    0.95       6.3 +/-    0.95  0.120 / 0.390