Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/21/2021   22:47:38   (  -0.03,-137.20) (  -0.81,-140.74)  403.41                80
 10/22/2021   22:31:34   (  -0.03,-137.21) (   0.19,-136.21)  113.20                80
 10/24/2021   10:50:45   (   0.03,-137.22) (   0.99,-141.49)  486.99                80
 10/25/2021   10:34:41   (   0.03,-137.22) (  -0.01,-136.96)   29.10                80
 10/27/2021   22:35:17   (  -0.02,-137.21) (  -0.13,-137.75)   61.46                80
 10/28/2021   22:19:14   (  -0.02,-137.20) (   0.87,-133.22)  454.01                80
 10/30/2021   10:38:24   (   0.01,-137.20) (   0.30,-138.50)  147.69                80
 10/31/2021   10:22:20   (   0.01,-137.19) (  -0.69,-133.97)  367.46                80
 11/01/2021   22:41:39   (  -0.01,-137.17) (  -0.49,-139.27)  239.73                80
 11/02/2021   22:25:35   (  -0.01,-137.16) (   0.51,-134.74)  275.19                80