Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 1 27.  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)  461.76                80
 01/28/2021   09:52:18   (   0.34,-127.66) (   0.27,-127.21)   50.34                80
 01/30/2021   21:58:10   (  -0.36,-127.61) (  -0.44,-127.98)   42.00                80
 01/31/2021   21:36:46   (  -0.34,-127.58) (   0.59,-123.45)  469.80                80
 02/02/2021   10:01:12   (   0.38,-127.46) (   0.69,-128.70)  142.13                80
 02/03/2021   09:39:47   (   0.36,-127.42) (  -0.33,-124.18)  369.35                80
 02/04/2021   22:04:24   (  -0.40,-127.41) (  -0.85,-129.48)  235.97                80
 02/05/2021   21:42:59   (  -0.38,-127.36) (   0.18,-124.95)  275.26                80
 02/07/2021   10:07:26   (   0.42,-127.24) (   1.10,-130.20)  337.73                80
 02/08/2021   09:46:01   (   0.40,-127.19) (   0.08,-125.67)  173.03                80
 02/09/2021   22:10:36   (  -0.44,-127.17) (  -1.31,-130.97)  433.52                80