Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 15.  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)
 12/16/2022   04:17:40   (  70.10, 112.08) 12/16/2022   04:18:09  (  70.11, 112.02)    2.60                29
 12/16/2022   05:08:13   ( -70.03, -80.46) 12/16/2022   05:07:38  ( -70.05, -80.43)    2.11                35
 12/18/2022   23:51:09   (  70.30, 178.42) 12/18/2022   23:52:20  (  70.24, 178.65)   10.97                71
 12/19/2022   00:41:40   ( -70.11, -13.93) 12/19/2022   00:41:50  ( -70.12, -13.88)    2.94                10
 12/19/2022   01:32:23   (  69.97, 153.58) 12/19/2022   01:31:18  (  69.96, 153.54)    1.86                65
 12/21/2022   20:15:08   ( -70.20,  52.57) 12/21/2022   20:16:03  ( -70.18,  52.64)    3.32                55
 12/21/2022   21:05:51   (  70.08,-139.95) 12/21/2022   21:05:30  (  70.07,-139.87)    3.33                21
 12/21/2022   21:56:17   ( -69.61,  28.12) 12/21/2022   21:55:06  ( -69.63,  27.16)   37.42                71
 12/24/2022   16:39:17   (  70.11, -73.34) 12/24/2022   16:39:43  (  70.09, -73.39)    2.66                26
 12/24/2022   17:29:51   ( -70.03,  94.13) 12/24/2022   17:29:12  ( -70.05,  94.17)    2.28                39
 12/27/2022   12:12:43   (  70.22,  -6.85) 12/27/2022   12:13:53  (  70.21,  -6.78)    2.82                70
 12/27/2022   13:03:17   ( -70.10, 160.67) 12/27/2022   13:03:23  ( -70.11, 160.71)    1.35                 6
 12/27/2022   13:53:59   (  70.00, -31.85) 12/27/2022   13:52:50  (  69.99, -31.81)    1.57                69