PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/05/28-18:27:40
G01     82.7           33.1               14.4 +/-    1.67      23.6 +/-    1.67  0.130 / 0.240
G07     130.8          40.4               16.1 +/-    1.06      23.3 +/-    1.06  0.140 / 0.210
G11     62.5           37.3               14.7 +/-    1.15      22.3 +/-    1.15  0.030 / 0.060
G13     287.1          37.4               19.2 +/-    2.10      29.1 +/-    2.10  0.040 / 0.060
G15     311.4          12.0               14.8 +/-    1.77      39.6 +/-    1.77  0.030 / 0.020
G17     220.2          57.1               19.6 +/-    1.22      22.9 +/-    1.22  0.030 / 0.030
G18     57.9           22.4               12.2 +/-    1.36      25.4 +/-    1.36  0.100 / 0.240
G19     217.9          31.2               19.5 +/-    1.93      33.3 +/-    1.93  0.080 / 0.170
G28     1.7            61.1               13.5 +/-    0.58      15.2 +/-    0.58  0.060 / 0.090
G30     121.2          70.5               16.6 +/-    1.07      17.5 +/-    1.07  0.060 / 0.100