PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/12/03-11:57:10
G02     44.5           45.4                5.1 +/-    1.39       6.8 +/-    1.39  0.030 / 0.040
G05     109.6          70.1                7.3 +/-    0.70       7.7 +/-    0.70  0.030 / 0.040
G12     189.3          52.7                8.3 +/-    0.49      10.2 +/-    0.49  0.030 / 0.020
G25     259.6          60.7                5.8 +/-    1.66       6.5 +/-    1.66  0.040 / 0.030
G29     317.4          39.7                2.9 +/-    0.80       4.2 +/-    0.80  0.040 / 0.030