PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/15-15:58:00
G01     57.9           29.7               12.6 +/-    2.00      22.2 +/-    2.00  0.050 / 0.050
G07     143.2          20.3               11.2 +/-    1.50      24.5 +/-    1.50  0.040 / 0.050
G11     47.1           21.6               11.8 +/-    2.21      24.9 +/-    2.21  0.070 / 0.140
G13     259.7          34.5               13.9 +/-    0.70      22.3 +/-    0.70  0.090 / 0.200
G15     294.1          15.4               10.2 +/-    1.80      25.0 +/-    1.80  0.070 / 0.160
G17     268.1          77.4               14.4 +/-    0.74      14.7 +/-    0.74  0.080 / 0.140
G18     40.9           11.3               11.3 +/-    0.85      30.8 +/-    0.85  0.210 / 0.380
G19     234.3          49.7               13.3 +/-    2.18      16.9 +/-    2.18  0.240 / 0.300
G28     39.2           56.0               12.2 +/-    0.79      14.4 +/-    0.79  0.110 / 0.080
G30     145.4          50.9               13.6 +/-    0.45      17.0 +/-    0.45  0.080 / 0.090