Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2022 12 14.  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   (  70.09, 112.08) 12/16/2022   04:18:09  (  70.11, 112.03)    2.81                29
 12/16/2022   05:08:13   ( -70.03, -80.46) 12/16/2022   05:07:38  ( -70.05, -80.42)    2.89                35
 12/18/2022   23:51:09   (  70.29, 178.42) 12/18/2022   23:52:20  (  70.25, 178.66)   10.61                71
 12/19/2022   00:41:40   ( -70.10, -13.93) 12/19/2022   00:41:51  ( -70.08, -13.94)    2.57                11
 12/19/2022   01:32:23   (  69.97, 153.59) 12/19/2022   01:31:18  (  69.97, 153.55)    1.48                65
 12/21/2022   20:15:07   ( -70.14,  52.65) 12/21/2022   20:16:04  ( -70.14,  52.59)    2.39                57
 12/21/2022   21:05:50   (  70.03,-139.86) 12/21/2022   21:05:31  (  70.03,-139.92)    2.29                19
 12/21/2022   21:56:17   ( -69.60,  28.12) 12/21/2022   21:55:06  ( -69.65,  27.18)   36.71                71
 12/24/2022   16:39:17   (  70.11, -73.34) 12/24/2022   16:39:43  (  70.13, -73.35)    1.53                26
 12/24/2022   17:29:51   ( -70.03,  94.14) 12/24/2022   17:29:13  ( -70.02,  94.14)    0.74                38
 12/27/2022   12:12:43   (  70.21,  -6.85) 12/27/2022   12:13:54  (  70.20,  -6.80)    2.71                71
 12/27/2022   13:03:17   ( -70.10, 160.67) 12/27/2022   13:03:24  ( -70.10, 160.69)    0.68                 7
 12/27/2022   13:53:59   (  69.99, -31.85) 12/27/2022   13:52:51  (  69.98, -31.83)    1.85                68