PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2019/04/19-20:27:50
G01     71.3           32.7               14.4 +/-    0.72      23.9 +/-    0.72  0.060 / 0.100
G07     136.6          25.9               16.5 +/-    0.94      31.6 +/-    0.94  0.070 / 0.100
G11     53.2           30.7               13.4 +/-    1.23      23.1 +/-    1.23  0.060 / 0.100
G13     274.7          38.4               15.4 +/-    1.59      23.0 +/-    1.59  0.060 / 0.140
G15     302.5          15.5                8.8 +/-    2.36      21.7 +/-    2.36  0.030 / 0.040
G17     230.9          69.2               14.7 +/-    1.25      15.7 +/-    1.25  0.040 / 0.040
G18     47.9           17.2               11.5 +/-    0.90      27.0 +/-    0.90  0.060 / 0.070
G19     222.8          41.4               17.4 +/-    0.87      24.7 +/-    0.87  0.050 / 0.080
G28     9.2            60.8               12.4 +/-    0.77      14.0 +/-    0.77  0.050 / 0.070
G30     134.7          61.0               16.5 +/-    0.76      18.5 +/-    0.76  0.060 / 0.090