PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/02/18-23:58:00
G01     91.6           31.2                9.2 +/-    0.79      15.8 +/-    0.79  0.040 / 0.050
G07     124.8          42.6                9.1 +/-    0.84      12.7 +/-    0.84  0.040 / 0.050
G11     68.3           39.7                6.9 +/-    1.09      10.1 +/-    1.09  0.110 / 0.230
G13     295.8          36.2                9.8 +/-    2.25      15.1 +/-    2.25  0.110 / 0.170
G17     212.2          54.4                9.5 +/-    0.34      11.4 +/-    0.34  0.070 / 0.090
G18     61.6           22.3                7.0 +/-    2.27      14.7 +/-    2.27  0.090 / 0.090
G19     213.5          25.0                9.2 +/-    2.28      17.9 +/-    2.28  0.060 / 0.040
G28     338.9          61.7                6.3 +/-    0.45       7.1 +/-    0.45  0.050 / 0.040
G30     98.4           77.4                7.6 +/-    0.56       7.8 +/-    0.56  0.080 / 0.210