PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/30-13:28:00
G03     217.4          64.9               10.4 +/-    0.70      11.3 +/-    0.70  0.040 / 0.050
G07     251.7          15.1                5.8 +/-    2.81      14.3 +/-    2.81  0.040 / 0.040
G09     304.9          19.6                5.8 +/-    1.29      12.8 +/-    1.29  0.060 / 0.180
G14     102.4          11.5                9.6 +/-    1.62      26.0 +/-    1.62  0.090 / 0.310
G16     126.1          60.4               11.0 +/-    0.80      12.5 +/-    0.80  0.040 / 0.050
G22     188.8          48.7                9.1 +/-    0.93      11.6 +/-    0.93  0.040 / 0.050
G23     322.5          52.5                8.6 +/-    0.69      10.5 +/-    0.69  0.130 / 0.380
G26     66.5           51.4                8.1 +/-    1.70      10.1 +/-    1.70  0.150 / 0.420
G31     54.1           17.1                7.2 +/-    1.86      16.9 +/-    1.86  0.030 / 0.050