PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/04/26-19:27:50
G01     117.4          19.2               14.6 +/-    1.50      32.7 +/-    1.50  0.090 / 0.200
G07     84.8           65.9               12.9 +/-    0.42      14.0 +/-    0.42  0.110 / 0.200
G08     45.2           33.0                9.4 +/-    1.07      15.5 +/-    1.07  0.080 / 0.060
G09     177.1          24.4               14.7 +/-    1.38      29.1 +/-    1.38  0.040 / 0.090
G11     106.1          40.7               14.1 +/-    0.45      20.3 +/-    0.45  0.120 / 0.190
G13     316.8          20.7               10.7 +/-    1.90      23.1 +/-    1.90  0.140 / 0.210
G17     203.5          22.7               14.3 +/-    1.39      29.4 +/-    1.39  0.030 / 0.040
G18     92.7           21.6               12.4 +/-    2.25      26.2 +/-    2.25  0.030 / 0.030
G28     297.2          58.3               11.9 +/-    1.00      13.8 +/-    1.00  0.030 / 0.040
G30     354.7          71.3               12.0 +/-    0.57      12.6 +/-    0.57  0.030 / 0.040