PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/08-19:27:50
G01     94.8           30.7               17.6 +/-    1.24      30.3 +/-    1.24  0.190 / 0.570
G07     121.6          49.4               18.3 +/-    0.56      23.2 +/-    0.56  0.110 / 0.170
G08     42.2           13.2               10.4 +/-    3.22      27.1 +/-    3.22  0.030 / 0.040
G11     74.7           41.8               15.8 +/-    1.29      22.3 +/-    1.29  0.030 / 0.040
G13     299.1          34.4               13.2 +/-    1.26      21.1 +/-    1.26  0.040 / 0.040
G17     212.6          45.9               17.6 +/-    0.56      23.4 +/-    0.56  0.040 / 0.050
G18     68.3           24.6               15.3 +/-    1.33      30.1 +/-    1.33  0.040 / 0.050
G19     213.1          22.3               19.2 +/-    2.08      40.0 +/-    2.08  0.030 / 0.050
G28     341.9          61.9               14.1 +/-    0.61      15.8 +/-    0.61  0.060 / 0.100
G30     91.4           77.5               17.2 +/-    0.36      17.5 +/-    0.36  0.070 / 0.090