PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/07/21-01:57:50
G08     307.6          19.2                4.9 +/-    1.03      11.0 +/-    1.03  0.090 / 0.150
G10     346.1          61.7                7.4 +/-    0.58       8.3 +/-    0.58  0.110 / 0.110
G14     220.7          35.1                9.9 +/-    2.82      15.7 +/-    2.82  0.040 / 0.060
G20     46.8           58.3                9.4 +/-    0.90      10.9 +/-    0.90  0.040 / 0.060
G21     139.4          52.5                9.9 +/-    0.56      12.1 +/-    0.56  0.060 / 0.080
G24     68.4           29.5                7.4 +/-    2.00      13.1 +/-    2.00  0.070 / 0.090
G27     268.7          36.5                9.4 +/-    2.01      14.5 +/-    2.01  0.100 / 0.180
G32     227.8          56.3                8.6 +/-    2.30      10.2 +/-    2.30  0.090 / 0.190