Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/27/2021   10:13:43   (   0.36,-127.69) (   1.29,-131.74)  461.75                80
 01/28/2021   09:52:18   (   0.34,-127.65) (   0.27,-127.21)   50.30                80
 01/30/2021   21:58:10   (  -0.36,-127.61) (  -0.43,-127.98)   42.16                80
 01/31/2021   21:36:46   (  -0.34,-127.57) (   0.59,-123.46)  469.64                80
 02/02/2021   10:01:12   (   0.38,-127.46) (   0.68,-128.71)  142.25                80
 02/03/2021   09:39:48   (   0.36,-127.42) (  -0.34,-124.18)  369.19                80
 02/04/2021   22:04:24   (  -0.40,-127.40) (  -0.84,-129.48)  236.22                80
 02/05/2021   21:42:58   (  -0.38,-127.36) (   0.13,-124.94)  275.01                80
 02/07/2021   10:07:26   (   0.42,-127.24) (   1.09,-130.20)  337.95                80
 02/08/2021   09:46:01   (   0.40,-127.19) (   0.06,-125.68)  172.78                80