Simultaneous Nadir Overpasses (SNOs) between GOES-14 and NPP
TLE Epoch: 2021 1 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-14)   GOES-14 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/01/2021   08:17:15   (  -0.07,-104.36) (  -0.24,-103.51)   96.78                80
 01/03/2021   20:20:27   (   0.08,-104.07) (   0.04,-104.28)   23.01                80
 01/04/2021   20:04:23   (   0.07,-104.08) (   1.06, -99.75)  493.49                80
 01/06/2021   08:26:11   (  -0.08,-104.36) (   0.10,-105.02)   76.57                80
 01/07/2021   08:04:46   (  -0.07,-104.36) (  -0.92,-100.50)  439.61                80
 01/08/2021   20:26:43   (   0.08,-104.07) (  -0.29,-105.80)  196.74                80
 01/09/2021   20:10:38   (   0.07,-104.07) (   0.72,-101.27)  319.63                80
 01/11/2021   08:29:47   (  -0.07,-104.35) (   0.43,-106.54)  250.08                80
 01/12/2021   08:11:02   (  -0.06,-104.35) (  -0.59,-102.01)  265.97                80
 01/13/2021   20:32:57   (   0.07,-104.05) (  -0.67,-107.30)  370.77                80
 01/14/2021   20:16:53   (   0.06,-104.05) (   0.34,-102.77)  145.53                80