Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/22/2021   22:46:10   (   0.03,-137.21) (  -0.72,-140.60)  386.61                80
 01/23/2021   22:30:05   (   0.02,-137.20) (   0.24,-136.06)  128.93                80
 01/25/2021   10:51:52   (   0.02,-137.18) (   0.96,-141.32)  472.87                80
 01/26/2021   10:30:27   (   0.02,-137.16) (  -0.06,-136.80)   41.78                80
 01/28/2021   22:33:39   (  -0.01,-137.12) (  -0.11,-137.57)   51.51                80
 01/29/2021   22:17:35   (  -0.01,-137.10) (   0.92,-133.04)  462.72                80
 01/31/2021   10:39:22   (   0.01,-137.07) (   0.29,-138.31)  141.29                80
 02/01/2021   10:17:58   (   0.01,-137.05) (  -0.73,-133.78)  372.55                80
 02/02/2021   22:39:54   (  -0.01,-137.01) (  -0.44,-139.08)  236.20                80
 02/03/2021   22:23:48   (  -0.01,-136.98) (   0.53,-134.54)  277.41                80