Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 10 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/28/2021   22:19:14   (  -0.03,-137.23) (   0.90,-133.22)  456.90                80
 10/30/2021   10:38:23   (   0.02,-137.22) (   0.33,-138.49)  145.00                80
 10/31/2021   10:22:21   (   0.02,-137.22) (  -0.73,-133.97)  370.58                80
 11/01/2021   22:41:39   (  -0.02,-137.21) (  -0.46,-139.28)  235.34                80
 11/02/2021   22:25:36   (  -0.02,-137.20) (   0.55,-134.75)  280.01                80
 11/04/2021   10:44:45   (   0.02,-137.19) (   0.68,-140.02)  322.73                80
 11/05/2021   10:28:43   (   0.02,-137.18) (  -0.38,-135.50)  192.00                80
 11/06/2021   22:48:00   (  -0.01,-137.15) (  -0.85,-140.80)  415.66                80
 11/07/2021   22:31:56   (  -0.02,-137.14) (   0.15,-136.27)   98.52                80
 11/10/2021   10:32:23   (   0.01,-137.09) (   0.01,-137.02)    7.88                80