Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 12 13.  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) (   0.89,-132.00)  476.44                80
 12/14/2021   09:56:44   (  -0.01,-127.78) (  -0.08,-127.45)   36.73                80
 12/16/2021   21:57:13   (   0.02,-127.69) (  -0.09,-128.22)   60.03                80
 12/17/2021   21:41:06   (   0.00,-127.65) (   0.88,-123.68)  452.80                80
 12/19/2021   10:00:13   (  -0.02,-127.58) (   0.27,-128.95)  155.28                80
 12/20/2021   09:44:06   (  -0.01,-127.54) (  -0.70,-124.40)  356.97                80
 12/21/2021   22:03:20   (   0.03,-127.47) (  -0.50,-129.70)  254.37                80
 12/22/2021   21:47:15   (   0.02,-127.43) (   0.53,-125.17)  257.77                80
 12/24/2021   10:06:20   (  -0.04,-127.35) (   0.68,-130.42)  350.78                80
 12/25/2021   09:50:15   (  -0.03,-127.30) (  -0.36,-125.89)  160.96                80
 12/26/2021   22:09:29   (   0.05,-127.23) (  -0.84,-131.19)  451.35                80