Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 5 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2020   22:33:43   (   0.01,-137.18) (  -0.08,-137.56)   43.83                80
 05/18/2020   22:17:39   (   0.01,-137.17) (   0.95,-133.03)  471.94                80
 05/20/2020   10:39:26   (  -0.01,-137.15) (   0.24,-138.30)  130.30                80
 05/21/2020   10:18:02   (  -0.01,-137.14) (  -0.79,-133.77)  384.93                80
 05/22/2020   22:39:57   (   0.01,-137.12) (  -0.44,-139.06)  221.09                80
 05/23/2020   22:23:52   (   0.01,-137.11) (   0.59,-134.53)  293.73                80
 05/25/2020   10:45:40   (  -0.00,-137.08) (   0.60,-139.80)  310.01                80
 05/26/2020   10:24:15   (  -0.00,-137.05) (  -0.43,-135.27)  204.23                80
 05/27/2020   22:46:10   (  -0.00,-137.02) (  -0.79,-140.56)  403.51                80
 05/28/2020   22:30:05   (  -0.01,-137.00) (   0.18,-136.02)  110.48                80