PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/05/12-21:43:00
G02     209.1          50.5               13.6 +/-    0.75      17.0 +/-    0.75  0.070 / 0.180
G06     115.9          80.0               13.0 +/-    0.54      13.2 +/-    0.54  0.060 / 0.190
G12     313.6          24.8               12.4 +/-    2.99      24.4 +/-    2.99  0.030 / 0.020
G17     48.8           38.7               10.6 +/-    0.56      15.7 +/-    0.56  0.040 / 0.030
G19     27.2           55.3               11.5 +/-    0.82      13.7 +/-    0.82  0.040 / 0.050
G24     278.1          42.5                9.5 +/-    1.40      13.2 +/-    1.40  0.030 / 0.050
G28     113.6          25.2               13.8 +/-    0.80      26.8 +/-    0.80  0.150 / 0.200