PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/10/21-17:12:30
G10     252.7          30.2               10.1 +/-    1.15      17.5 +/-    1.15  0.040 / 0.040
G13     50.9           27.3                6.8 +/-    1.85      12.5 +/-    1.85  0.040 / 0.060
G15     79.3           56.1                7.9 +/-    0.37       9.3 +/-    0.37  0.140 / 0.780
G16     292.6          15.8                8.0 +/-    2.95      19.5 +/-    2.95  0.170 / 0.810
G20     275.4          54.0               11.6 +/-    0.76      14.0 +/-    0.76  0.040 / 0.050
G21     337.0          61.3                9.2 +/-    0.56      10.3 +/-    0.56  0.040 / 0.040
G26     266.0          14.5               10.0 +/-    1.29      25.0 +/-    1.29  0.070 / 0.130
G29     164.5          48.5               11.0 +/-    0.56      14.1 +/-    0.56  0.070 / 0.110