PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/11-04:28:00
G10     254.1          30.7               14.0 +/-    1.68      24.2 +/-    1.68  0.040 / 0.060
G13     49.8           26.7                6.9 +/-    3.26      12.9 +/-    3.26  0.040 / 0.040
G15     76.7           55.5               10.0 +/-    1.53      11.9 +/-    1.53  0.110 / 0.120
G16     294.9          14.4               10.3 +/-    1.36      25.9 +/-    1.36  0.100 / 0.150
G20     275.7          53.4               11.8 +/-    3.55      14.3 +/-    3.55  0.090 / 0.180
G21     341.2          63.5               11.0 +/-    1.01      12.1 +/-    1.01  0.080 / 0.190
G26     266.6          13.8               13.2 +/-    2.20      33.7 +/-    2.20  0.030 / 0.040
G29     163.1          42.4               11.4 +/-    0.92      16.0 +/-    0.92  0.030 / 0.040