Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 4.  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)
 12/04/2022   18:42:12   (  70.18,-104.17) 12/04/2022   18:43:21  (  70.17,-104.19)    1.80                69
 12/04/2022   19:32:36   ( -70.13,  63.31) 12/04/2022   19:32:50  ( -70.10,  63.35)    2.92                14
 12/04/2022   20:23:19   (  70.00,-129.19) 12/04/2022   20:22:17  (  70.01,-129.14)    2.11                62
 12/07/2022   19:12:56   (  70.98,-113.07) 12/07/2022   19:14:03  (  70.86,-110.90)   80.08                67
 12/07/2022   20:03:05   ( -70.14,  55.68) 12/07/2022   20:03:44  ( -70.14,  55.68)    0.57                39
 12/07/2022   20:53:49   (  70.06,-136.89) 12/07/2022   20:53:11  (  70.04,-136.82)    3.04                38
 12/07/2022   21:44:00   ( -69.32,  31.59) 12/07/2022   21:42:51  ( -69.38,  29.90)   66.60                69
 12/10/2022   20:33:35   ( -70.15,  48.05) 12/10/2022   20:34:39  ( -70.16,  47.98)    2.88                64
 12/10/2022   21:24:19   (  70.08,-144.53) 12/10/2022   21:24:06  (  70.05,-144.53)    2.45                13
 12/10/2022   22:14:43   ( -70.02,  22.95) 12/10/2022   22:13:35  ( -70.00,  23.03)    3.49                68
 12/13/2022   21:04:16   ( -70.74,  39.49) 12/13/2022   21:05:25  ( -70.65,  40.97)   55.28                69
 12/13/2022   21:54:49   (  70.11,-152.19) 12/13/2022   21:55:00  (  70.11,-152.18)    0.49                11
 12/13/2022   22:45:13   ( -70.04,  15.32) 12/13/2022   22:44:29  ( -70.06,  15.38)    3.44                44
 12/16/2022   22:25:18   (  70.16,-159.87) 12/16/2022   22:25:53  (  70.14,-159.86)    1.86                35
 12/16/2022   23:15:42   ( -70.05,   7.68) 12/16/2022   23:15:23  ( -70.04,   7.63)    2.39                19
 12/17/2022   00:06:10   (  69.17, 176.28) 12/17/2022   00:05:03  (  69.21, 174.14)   84.43                67