Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/05/2020   10:07:32   (   0.01,-128.02) (   0.50,-130.27)  255.80                80
 12/06/2020   09:46:07   (  -0.01,-128.05) (  -0.51,-125.74)  262.58                80
 12/07/2020   22:10:42   (  -0.03,-128.08) (  -0.67,-131.04)  336.92                80
 12/08/2020   21:49:17   (  -0.00,-128.10) (   0.34,-126.51)  181.04                80
 12/10/2020   10:13:43   (   0.04,-128.12) (   0.84,-131.77)  416.24                80
 12/11/2020   09:52:18   (   0.02,-128.13) (  -0.18,-127.24)  101.66                80
 12/12/2020   22:16:52   (  -0.06,-128.16) (  -1.06,-132.53)  498.33                80
 12/13/2020   21:55:27   (  -0.04,-128.17) (   0.01,-128.01)   19.03                80
 12/16/2020   10:01:07   (   0.07,-128.18) (   0.21,-128.73)   62.69                80
 12/17/2020   09:39:43   (   0.04,-128.19) (  -0.87,-124.21)  454.41                80