PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2017/09/26-16:58:10
G02     31.0           57.6               12.0 +/-    0.51      14.0 +/-    0.51  0.030 / 0.040
G05     150.2          58.6               14.2 +/-    0.55      16.3 +/-    0.55  0.040 / 0.040
G06     52.6           18.5               10.2 +/-    0.72      23.2 +/-    0.72  0.040 / 0.060
G12     203.7          70.0               12.3 +/-    1.28      13.0 +/-    1.28  0.040 / 0.060
G20     198.1          24.6               15.4 +/-    1.90      30.4 +/-    1.90  0.070 / 0.130
G25     296.9          54.6               12.6 +/-    1.00      15.1 +/-    1.00  0.070 / 0.130
G29     308.1          30.3               11.3 +/-    1.50      19.6 +/-    1.50  0.100 / 0.250