Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 6 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/24/2020   09:39:49   (   0.01,-127.96) (  -0.84,-124.19)  429.26                80
 06/25/2020   22:04:24   (  -0.03,-127.95) (  -0.38,-129.49)  175.12                80
 06/26/2020   21:43:00   (  -0.02,-127.98) (   0.67,-124.96)  344.64                80
 06/28/2020   10:07:27   (   0.03,-128.08) (   0.51,-130.23)  244.78                80
 06/29/2020   09:46:03   (   0.02,-128.10) (  -0.54,-125.70)  274.43                80
 06/30/2020   22:10:38   (  -0.03,-128.09) (  -0.67,-130.99)  331.26                80
 07/01/2020   21:49:14   (  -0.02,-128.11) (   0.37,-126.47)  187.83                80
 07/03/2020   10:13:41   (   0.03,-128.20) (   0.80,-131.73)  402.47                80
 07/04/2020   09:52:15   (   0.02,-128.22) (  -0.18,-127.20)  116.06                80
 07/05/2020   22:16:52   (  -0.02,-128.19) (  -0.96,-132.50)  491.02                80
 07/06/2020   21:58:06   (  -0.01,-128.21) (   0.02,-127.96)   27.68                80