Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 8.  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)
 12/10/2022   11:29:31   (  70.34,   3.76) 12/10/2022   11:30:43  (  70.27,   4.11)   14.79                72
 12/10/2022   12:20:00   ( -70.08, 171.51) 12/10/2022   12:20:14  ( -70.10, 171.50)    2.49                14
 12/10/2022   13:10:45   (  70.01, -21.07) 12/10/2022   13:09:41  (  70.00, -21.00)    2.63                64
 12/13/2022   07:53:29   ( -70.18,-122.00) 12/13/2022   07:54:28  ( -70.18,-121.96)    1.36                59
 12/13/2022   08:44:13   (  70.06,  45.49) 12/13/2022   08:43:55  (  70.07,  45.53)    1.82                18
 12/13/2022   09:34:41   ( -69.75,-146.68) 12/13/2022   09:33:28  ( -69.80,-147.22)   21.48                73
 12/16/2022   04:17:41   (  70.13, 112.02) 12/16/2022   04:18:09  (  70.11, 112.03)    2.55                28
 12/16/2022   05:08:12   ( -70.02, -80.44) 12/16/2022   05:07:38  ( -70.01, -80.48)    1.94                34
 12/18/2022   23:51:09   (  70.28, 178.44) 12/18/2022   23:52:20  (  70.24, 178.66)    9.54                71
 12/19/2022   00:41:40   ( -70.09, -13.91) 12/19/2022   00:41:51  ( -70.08, -13.93)    1.28                11
 12/19/2022   01:32:23   (  69.95, 153.60) 12/19/2022   01:31:18  (  69.97, 153.55)    2.55                65
 12/21/2022   20:15:08   ( -70.18,  52.59) 12/21/2022   20:16:03  ( -70.19,  52.66)    2.72                55
 12/21/2022   21:05:51   (  70.07,-139.93) 12/21/2022   21:05:30  (  70.07,-139.86)    2.47                21
 12/21/2022   21:56:17   ( -69.59,  28.14) 12/21/2022   21:55:06  ( -69.64,  27.18)   37.74                71