PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/01-01:28:00
G02     38.1           50.7                8.1 +/-    1.65      10.1 +/-    1.65  0.040 / 0.060
G05     125.5          66.0               11.0 +/-    0.27      11.9 +/-    0.27  0.040 / 0.060
G06     55.5           14.2                7.8 +/-    2.43      19.8 +/-    2.43  0.020 / 0.030
G12     198.3          64.6               11.2 +/-    0.43      12.3 +/-    0.43  0.020 / 0.030
G25     288.0          56.6                5.5 +/-    3.33       6.4 +/-    3.33  0.030 / 0.030
G29     312.7          35.1                8.6 +/-    1.26      13.7 +/-    1.26  0.030 / 0.030