Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 6 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/20/2021   08:30:01   (  -0.04,-104.10) (   0.51,-106.55)  279.97                80
 06/21/2021   08:13:58   (  -0.03,-104.10) (  -0.52,-102.03)  236.72                80
 06/22/2021   20:33:16   (   0.06,-104.33) (  -0.62,-107.35)  343.69                80
 06/23/2021   20:17:13   (   0.05,-104.33) (   0.41,-102.82)  172.60                80
 06/25/2021   08:36:21   (  -0.08,-104.09) (   0.82,-108.08)  454.95                80
 06/26/2021   08:20:18   (  -0.07,-104.09) (  -0.21,-103.56)   61.56                80
 06/28/2021   20:20:51   (   0.08,-104.33) (   0.05,-104.34)    3.52                80
 07/01/2021   08:23:56   (  -0.10,-104.11) (   0.15,-105.08)  111.46                80
 07/02/2021   08:07:53   (  -0.08,-104.11) (  -0.89,-100.55)  405.64                80
 07/03/2021   20:27:11   (   0.12,-104.35) (  -0.25,-105.87)  173.66                80