Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/17/2021   10:01:15   (   0.28,-127.98) (   0.47,-128.74)   87.73                80
 01/18/2021   09:39:52   (   0.25,-127.96) (  -0.61,-124.23)  425.72                80
 01/19/2021   22:04:27   (  -0.30,-127.97) (  -0.65,-129.52)  176.33                80
 01/20/2021   21:43:02   (  -0.27,-127.95) (   0.37,-124.99)  336.84                80
 01/22/2021   10:07:30   (   0.32,-127.86) (   0.83,-130.25)  272.52                80
 01/23/2021   09:46:05   (   0.30,-127.83) (  -0.19,-125.72)  240.38                80
 01/24/2021   22:10:41   (  -0.34,-127.83) (  -1.06,-131.01)  362.64                80
 01/25/2021   21:49:16   (  -0.32,-127.80) (  -0.04,-126.48)  149.82                80
 01/27/2021   10:13:43   (   0.36,-127.70) (   1.25,-131.75)  460.92                80
 01/28/2021   09:52:19   (   0.34,-127.66) (   0.22,-127.22)   51.24                80
 01/30/2021   21:58:10   (  -0.37,-127.62) (  -0.43,-127.98)   41.05                80