PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/13-17:58:00
G01     99.6           28.4               13.3 +/-    0.92      24.1 +/-    0.92  0.040 / 0.050
G07     118.1          46.8               14.3 +/-    0.94      18.8 +/-    0.94  0.040 / 0.050
G08     41.6           14.8               10.0 +/-    2.24      25.0 +/-    2.24  0.040 / 0.060
G11     78.3           42.5               13.1 +/-    0.81      18.4 +/-    0.81  0.050 / 0.050
G13     303.4          33.3               11.5 +/-    1.79      18.8 +/-    1.79  0.040 / 0.070
G17     208.1          44.3               14.6 +/-    0.39      19.9 +/-    0.39  0.040 / 0.080
G18     71.3           24.2               12.3 +/-    1.41      24.5 +/-    1.41  0.080 / 0.160
G19     210.4          19.5                3.0 +/-   15.49       6.7 +/-   15.49  0.090 / 0.160
G28     320.9          60.5               12.4 +/-    0.80      14.1 +/-    0.80  0.220 / 0.250
G30     73.1           78.6               13.9 +/-    1.11      14.1 +/-    1.11  0.120 / 0.250