Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/11/2021   22:46:05   (   0.04,-137.22) (  -0.73,-140.59)  385.34                80
 03/12/2021   22:30:01   (   0.04,-137.22) (   0.31,-136.07)  131.19                80
 03/14/2021   10:51:48   (  -0.04,-137.21) (   0.88,-141.33)  470.10                80
 03/15/2021   10:30:24   (  -0.04,-137.20) (  -0.16,-136.81)   46.16                80
 03/17/2021   22:33:34   (   0.04,-137.20) (  -0.02,-137.57)   42.36                80
 03/18/2021   22:17:29   (   0.04,-137.19) (   0.96,-133.03)  473.34                80
 03/20/2021   10:39:16   (  -0.04,-137.17) (   0.23,-138.30)  129.41                80
 03/21/2021   10:17:52   (  -0.03,-137.15) (  -0.81,-133.77)  385.71                80
 03/22/2021   22:39:47   (   0.03,-137.14) (  -0.41,-139.07)  220.24                80
 03/23/2021   22:23:42   (   0.02,-137.12) (   0.57,-134.53)  294.56                80