Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 5 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/03/2021   10:13:27   (   0.05,-127.76) (   0.95,-131.72)  451.25                80
 05/04/2021   09:52:03   (   0.05,-127.80) (  -0.08,-127.19)   68.55                80
 05/06/2021   21:55:17   (  -0.05,-127.85) (  -0.11,-127.97)   14.89                80
 05/09/2021   10:01:03   (   0.05,-128.00) (   0.23,-128.73)   83.22                80
 05/10/2021   09:39:40   (   0.04,-128.03) (  -0.81,-124.20)  436.25                80
 05/11/2021   22:01:37   (  -0.04,-128.03) (  -0.40,-129.50)  168.70                80
 05/12/2021   21:45:33   (  -0.04,-128.07) (   0.63,-124.98)  351.13                80
 05/14/2021   10:07:23   (   0.04,-128.17) (   0.52,-130.26)  238.15                80
 05/15/2021   09:45:59   (   0.04,-128.20) (  -0.51,-125.74)  280.57                80
 05/16/2021   22:07:56   (  -0.04,-128.18) (  -0.69,-131.04)  326.57                80