Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/04/2021   10:39:20   (  -0.05,-137.22) (   0.22,-138.32)  126.10                80
 03/05/2021   10:17:56   (  -0.05,-137.21) (  -0.81,-133.79)  390.07                80
 03/06/2021   22:39:52   (   0.05,-137.21) (  -0.35,-139.10)  214.32                80
 03/07/2021   22:23:47   (   0.04,-137.21) (   0.63,-134.56)  301.56                80
 03/09/2021   10:45:34   (  -0.03,-137.19) (   0.57,-139.82)  300.64                80
 03/10/2021   10:24:10   (  -0.03,-137.18) (  -0.47,-135.30)  215.00                80
 03/11/2021   22:46:05   (   0.02,-137.17) (  -0.75,-140.59)  390.01                80
 03/12/2021   22:30:00   (   0.02,-137.16) (   0.29,-136.06)  125.60                80
 03/14/2021   10:51:48   (  -0.02,-137.14) (   0.90,-141.33)  476.86                80
 03/15/2021   10:30:22   (  -0.02,-137.13) (  -0.08,-136.79)   38.34                80
 03/17/2021   22:33:33   (   0.02,-137.10) (  -0.09,-137.56)   52.80                80