Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 6.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 12/07/2022   15:56:00   (  70.13, -62.55) 12/07/2022   15:56:30  (  70.14, -62.51)    2.44                30
 12/07/2022   16:46:32   ( -70.03, 104.95) 12/07/2022   16:46:00  ( -70.03, 104.96)    0.81                32
 12/10/2022   11:29:32   (  70.37,   3.71) 12/10/2022   11:30:43  (  70.30,   4.15)   18.27                71
 12/10/2022   12:20:00   ( -70.06, 171.54) 12/10/2022   12:20:15  ( -70.08, 171.46)    3.36                15
 12/10/2022   13:10:45   (  69.99, -21.04) 12/10/2022   13:09:42  (  69.97, -21.04)    1.62                63
 12/13/2022   07:53:28   ( -70.16,-121.97) 12/13/2022   07:54:28  ( -70.16,-121.98)    0.56                60
 12/13/2022   08:44:12   (  70.04,  45.52) 12/13/2022   08:43:55  (  70.06,  45.51)    1.51                17
 12/13/2022   09:34:40   ( -69.73,-146.65) 12/13/2022   09:33:28  ( -69.78,-147.23)   23.32                72
 12/16/2022   04:17:40   (  70.12, 112.05) 12/16/2022   04:18:09  (  70.12, 112.04)    0.40                29
 12/16/2022   05:08:12   ( -70.00, -80.41) 12/16/2022   05:07:39  ( -70.01, -80.48)    2.88                33
 12/18/2022   23:51:10   (  70.32, 178.38) 12/18/2022   23:52:21  (  70.27, 178.70)   12.90                71
 12/19/2022   00:41:41   ( -70.13, -13.97) 12/19/2022   00:41:52  ( -70.11, -13.89)    3.08                11
 12/19/2022   01:32:24   (  69.99, 153.55) 12/19/2022   01:31:19  (  70.00, 153.59)    1.80                65