Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/28/2021   22:35:36   (  -0.00,-137.19) (  -0.11,-137.79)   66.99                80
 11/29/2021   22:19:30   (  -0.00,-137.19) (   0.86,-133.24)  449.18                80
 12/01/2021   10:38:36   (   0.00,-137.17) (   0.31,-138.51)  152.44                80
 12/02/2021   10:22:31   (   0.01,-137.16) (  -0.71,-133.98)  363.09                80
 12/03/2021   22:41:45   (  -0.01,-137.14) (  -0.50,-139.27)  243.50                80
 12/04/2021   22:25:40   (  -0.01,-137.12) (   0.53,-134.74)  271.43                80
 12/06/2021   10:47:26   (   0.00,-137.09) (   0.64,-140.01)  331.84                80
 12/07/2021   10:25:59   (   0.00,-137.07) (  -0.33,-135.47)  182.56                80
 12/08/2021   22:47:55   (   0.00,-137.04) (  -0.82,-140.77)  425.42                80
 12/09/2021   22:31:48   (   0.00,-137.02) (   0.15,-136.23)   89.00                80