PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/27-15:28:00
G01     80.7           32.6                8.1 +/-    1.01      13.4 +/-    1.01  0.040 / 0.080
G07     131.4          34.7                8.7 +/-    0.72      13.9 +/-    0.72  0.040 / 0.060
G11     60.4           36.7                7.2 +/-    0.57      11.0 +/-    0.57  0.060 / 0.060
G13     285.0          38.6               10.5 +/-    1.36      15.6 +/-    1.36  0.060 / 0.060
G15     309.7          13.0                8.1 +/-    1.10      21.2 +/-    1.10  0.040 / 0.100
G17     219.7          58.4               10.9 +/-    1.00      12.6 +/-    1.00  0.060 / 0.110
G18     55.6           21.4                5.9 +/-    1.09      12.6 +/-    1.09  0.090 / 0.110
G19     217.3          34.8               11.3 +/-    2.42      18.0 +/-    2.42  0.100 / 0.130
G28     350.6          61.6                7.7 +/-    0.61       8.6 +/-    0.61  0.030 / 0.050
G30     124.0          67.9                9.8 +/-    0.75      10.5 +/-    0.75  0.030 / 0.060