Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/17/2020   09:52:31   (  -0.07,-128.30) (  -0.29,-127.32)  111.53                80
 05/18/2020   22:17:06   (   0.04,-128.28) (  -0.95,-132.61)  493.66                80
 05/19/2020   21:57:49   (   0.06,-128.28) (   0.09,-128.08)   22.16                47
 05/22/2020   10:01:25   (  -0.05,-128.27) (   0.07,-128.82)   62.74                80
 05/23/2020   09:40:00   (  -0.06,-128.25) (  -0.96,-124.29)  451.93                80
 05/24/2020   22:04:36   (   0.04,-128.22) (  -0.27,-129.58)  155.10                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.77,-125.05)  359.62                80
 05/27/2020   10:07:38   (  -0.03,-128.19) (   0.42,-130.32)  241.61                80
 05/28/2020   09:46:13   (  -0.04,-128.17) (  -0.55,-125.78)  272.36                80
 05/29/2020   22:10:48   (   0.02,-128.12) (  -0.67,-131.07)  336.40                80