PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/18-02:28:00
G02     40.8           48.3                5.0 +/-    1.72       6.4 +/-    1.72  0.040 / 0.040
G05     117.6          67.6                6.3 +/-    0.70       6.7 +/-    0.70  0.050 / 0.040
G06     57.1           12.6                4.5 +/-    2.00      11.9 +/-    2.00  0.030 / 0.040
G12     195.6          61.3                8.2 +/-    0.91       9.2 +/-    0.91  0.040 / 0.040
G25     281.7          58.0                0.6 +/-    2.57       0.7 +/-    2.57  0.020 / 0.030
G29     315.3          38.0                5.4 +/-    0.77       8.1 +/-    0.77  0.030 / 0.030