Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2022 12 2.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 12/03/2022   06:26:49   ( -70.30,-100.52) 12/03/2022   06:28:01  ( -70.26,-100.24)   11.39                72
 12/03/2022   07:17:30   (  70.08,  67.14) 12/03/2022   07:17:30  (  70.05,  67.11)    3.06                 0
 12/03/2022   08:07:54   ( -70.01,-125.36) 12/03/2022   08:06:59  ( -69.99,-125.34)    2.45                55
 12/06/2022   06:57:35   ( -71.13,-109.48) 12/06/2022   06:58:41  ( -71.03,-106.80)   97.39                66
 12/06/2022   07:48:01   (  70.11,  59.47) 12/06/2022   07:48:23  (  70.11,  59.47)    0.39                22
 12/06/2022   08:38:25   ( -70.06,-133.05) 12/06/2022   08:37:52  ( -70.05,-132.98)    2.48                33
 12/09/2022   08:18:32   (  70.16,  51.80) 12/09/2022   08:19:16  (  70.15,  51.80)    0.45                44
 12/09/2022   09:08:56   ( -70.10,-140.72) 12/09/2022   09:08:45  ( -70.10,-140.64)    2.92                11
 12/09/2022   09:59:30   (  69.49,  27.49) 12/09/2022   09:58:20  (  69.55,  26.24)   48.98                70
 12/12/2022   08:49:02   (  70.20,  44.11) 12/12/2022   08:50:08  (  70.18,  44.11)    3.05                66
 12/12/2022   09:39:26   ( -70.13,-148.39) 12/12/2022   09:39:37  ( -70.12,-148.33)    2.38                11
 12/12/2022   10:30:09   (  70.02,  19.10) 12/12/2022   10:29:04  (  70.01,  19.16)    2.27                65
 12/15/2022   09:19:43   (  70.78,  35.58) 12/15/2022   09:20:52  (  70.67,  37.13)   58.13                69
 12/15/2022   10:09:57   ( -70.16,-156.04) 12/15/2022   10:10:30  ( -70.13,-156.04)    3.16                33
 12/15/2022   11:00:39   (  70.02,  11.49) 12/15/2022   10:59:57  (  70.02,  11.45)    1.73                42