PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/06/28-15:28:00
G01     78.4           32.7                9.8 +/-    0.40      16.2 +/-    0.40  0.050 / 0.080
G07     132.7          33.1               10.6 +/-    0.57      17.5 +/-    0.57  0.040 / 0.110
G11     58.7           35.6                8.3 +/-    0.46      13.0 +/-    0.46  0.040 / 0.070
G13     282.6          38.7                9.3 +/-    1.12      13.8 +/-    1.12  0.030 / 0.070
G15     308.2          13.6                7.6 +/-    1.80      19.4 +/-    1.80  0.050 / 0.100
G17     221.6          60.2               11.7 +/-    1.34      13.2 +/-    1.34  0.050 / 0.110
G18     53.9           20.7                7.5 +/-    1.67      16.2 +/-    1.67  0.080 / 0.110
G19     218.5          36.6               10.6 +/-    1.74      16.4 +/-    1.74  0.090 / 0.110
G28     354.3          61.5                9.9 +/-    0.64      11.1 +/-    0.64  0.030 / 0.050
G30     127.0          66.2               10.2 +/-    0.91      11.0 +/-    0.91  0.040 / 0.040