Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 12 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 12/21/2021   06:00:08   (   0.13,-127.86) (   0.19,-127.70)   18.67                80
 12/22/2021   18:21:38   (  -0.12,-127.91) (   0.88,-132.25)  495.26                80
 12/23/2021   17:58:19   (  -0.12,-127.94) (  -0.25,-127.25)   77.08                80
 12/25/2021   06:19:59   (   0.10,-127.97) (  -0.75,-131.86)  442.00                80
 12/26/2021   05:56:40   (   0.11,-128.00) (   0.38,-126.86)  129.90                80
 12/27/2021   18:18:10   (  -0.10,-128.04) (   0.68,-131.41)  384.70                80
 12/28/2021   17:54:50   (  -0.11,-128.07) (  -0.45,-126.42)  187.00                80
 12/30/2021   06:16:31   (   0.09,-128.10) (  -0.54,-131.02)  333.11                80
 12/31/2021   05:53:11   (   0.10,-128.11) (   0.59,-126.03)  237.88                80
 01/01/2022   18:14:42   (  -0.09,-128.14) (   0.46,-130.58)  278.39                80