Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/20/2021   10:45:02   (   0.01,-137.22) (   0.67,-140.04)  322.69                80
 11/21/2021   10:28:57   (   0.01,-137.21) (  -0.35,-135.51)  193.38                80
 11/22/2021   22:48:12   (  -0.01,-137.19) (  -0.80,-140.82)  412.49                80
 11/23/2021   22:32:06   (  -0.01,-137.19) (   0.22,-136.29)  103.21                80
 11/25/2021   10:51:13   (   0.01,-137.17) (   0.96,-141.55)  498.74                80
 11/26/2021   10:32:26   (   0.01,-137.16) (  -0.00,-137.01)   16.69                80
 11/28/2021   22:35:36   (  -0.00,-137.12) (  -0.13,-137.78)   75.54                80
 11/29/2021   22:19:30   (  -0.01,-137.10) (   0.84,-133.24)  439.41                80
 12/01/2021   10:41:16   (   0.00,-137.07) (   0.34,-138.51)  163.62                80
 12/02/2021   10:19:50   (   0.01,-137.05) (  -0.69,-133.98)  350.66                80
 12/03/2021   22:41:45   (  -0.00,-137.01) (  -0.52,-139.27)  258.16                80