Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/14/2020   10:13:59   (  -0.20,-127.86) (   0.70,-131.88)  457.90                80
 04/15/2020   09:52:34   (  -0.21,-127.89) (  -0.32,-127.35)   61.24                80
 04/17/2020   21:58:26   (   0.19,-127.97) (   0.14,-128.12)   18.43                80
 04/20/2020   10:01:29   (  -0.18,-128.04) (   0.03,-128.86)   93.83                80
 04/21/2020   09:40:05   (  -0.19,-128.07) (  -1.05,-124.34)  425.00                80
 04/22/2020   22:04:41   (   0.17,-128.10) (  -0.20,-129.63)  175.01                80
 04/23/2020   21:43:17   (   0.18,-128.13) (   0.88,-125.12)  343.91                80
 04/25/2020   10:07:44   (  -0.16,-128.17) (   0.32,-130.38)  251.38                80
 04/26/2020   09:46:20   (  -0.17,-128.19) (  -0.71,-125.85)  266.62                80