Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/22/2020   10:01:25   (  -0.05,-128.27) (   0.08,-128.81)   62.61                80
 05/23/2020   09:40:00   (  -0.06,-128.25) (  -0.95,-124.29)  452.09                80
 05/24/2020   22:04:35   (   0.04,-128.22) (  -0.28,-129.58)  154.91                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.76,-125.05)  359.80                80
 05/27/2020   10:07:38   (  -0.03,-128.19) (   0.43,-130.31)  241.42                80
 05/28/2020   09:46:14   (  -0.04,-128.17) (  -0.60,-125.79)  272.56                80
 05/29/2020   22:10:49   (   0.02,-128.12) (  -0.62,-131.08)  336.11                80
 05/30/2020   21:49:24   (   0.03,-128.11) (   0.35,-126.54)  178.13                80
 06/01/2020   10:13:51   (  -0.01,-128.09) (   0.84,-131.80)  423.23                80
 06/02/2020   09:52:27   (  -0.02,-128.07) (  -0.20,-127.27)   90.27                80