PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/06/28-21:28:00
G02     5.5            72.7               10.9 +/-    0.70      11.3 +/-    0.70  0.030 / 0.020
G05     159.4          42.6               14.0 +/-    0.60      19.5 +/-    0.60  0.030 / 0.030
G06     44.7           31.0                9.9 +/-    1.61      17.0 +/-    1.61  0.030 / 0.060
G12     275.2          80.4               11.6 +/-    0.80      11.8 +/-    0.80  0.040 / 0.060
G19     81.7           24.1               11.7 +/-    2.12      23.3 +/-    2.12  0.110 / 0.210
G24     221.1          16.4               14.1 +/-    2.54      34.0 +/-    2.54  0.160 / 0.210
G25     314.9          36.8               11.1 +/-    1.15      17.1 +/-    1.15  0.090 / 0.130
G29     292.1          13.0               12.6 +/-    3.48      33.0 +/-    3.48  0.090 / 0.120