PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/22-18:42:40
G01     88.1           32.3               11.5 +/-    1.29      19.2 +/-    1.29  0.120 / 0.070
G07     127.1          44.4               13.1 +/-    0.95      17.9 +/-    0.95  0.050 / 0.060
G11     67.4           39.6               10.7 +/-    1.83      15.6 +/-    1.83  0.080 / 0.040
G13     292.6          36.4               12.0 +/-    2.30      18.6 +/-    2.30  0.040 / 0.030
G17     216.4          52.4               15.5 +/-    0.80      19.0 +/-    0.80  0.420 / 0.240
G18     62.3           23.7               10.2 +/-    1.16      20.5 +/-    1.16  0.130 / 0.200
G19     215.6          27.2               15.3 +/-    1.50      28.5 +/-    1.50  0.270 / 0.130
G28     353.1          61.6               10.7 +/-    0.41      12.0 +/-    0.41  0.130 / 0.130
G30     110.8          74.1               12.3 +/-    1.11      12.8 +/-    1.11  0.150 / 0.080