Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 12 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/13/2021   10:12:50   (  -0.02,-127.81) (   0.91,-131.99)  476.35                80
 12/14/2021   09:56:44   (  -0.01,-127.78) (  -0.06,-127.45)   36.93                80
 12/16/2021   21:57:12   (   0.02,-127.69) (  -0.11,-128.22)   59.84                80
 12/17/2021   21:41:07   (   0.00,-127.65) (   0.92,-123.69)  453.05                80
 12/19/2021   10:00:12   (  -0.02,-127.58) (   0.29,-128.94)  154.90                80
 12/20/2021   09:44:06   (  -0.01,-127.54) (  -0.68,-124.40)  357.41                80
 12/21/2021   22:03:21   (   0.03,-127.48) (  -0.46,-129.71)  253.90                80
 12/22/2021   21:47:15   (   0.02,-127.43) (   0.51,-125.16)  258.26                80
 12/24/2021   10:06:21   (  -0.04,-127.36) (   0.64,-130.43)  350.17                80
 12/25/2021   09:50:14   (  -0.03,-127.31) (  -0.34,-125.89)  161.60                80