Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 7.  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)
 01/09/2023   06:45:15   (  70.23,  74.92) 01/09/2023   06:46:26  (  70.22,  75.08)    6.21                71
 01/09/2023   07:35:55   ( -70.04,-117.47) 01/09/2023   07:35:57  ( -70.05,-117.52)    2.79                 2
 01/09/2023   08:26:38   (  69.86,  50.10) 01/09/2023   08:25:25  (  69.89,  49.90)    8.22                73
 01/11/2023   23:02:08   (  70.15,-169.19) 01/11/2023   23:02:55  (  70.16,-169.11)    3.37                47
 01/11/2023   23:52:49   ( -70.00,  -1.65) 01/11/2023   23:52:26  ( -70.00,  -1.71)    2.25                23
 01/14/2023   15:19:01   (  70.07, -53.30) 01/14/2023   15:19:24  (  70.08, -53.34)    2.25                23
 01/14/2023   16:09:43   ( -69.98, 114.16) 01/14/2023   16:08:54  ( -69.98, 114.15)    0.73                49
 01/17/2023   06:45:11   ( -70.21,-105.07) 01/17/2023   06:46:23  ( -70.21,-104.92)    5.46                72
 01/17/2023   07:35:54   (  70.05,  62.49) 01/17/2023   07:35:51  (  70.04,  62.48)    1.81                 3
 01/17/2023   08:26:35   ( -69.90,-129.97) 01/17/2023   08:25:21  ( -69.94,-130.03)    4.21                74
 01/19/2023   23:02:04   ( -70.15,  10.80) 01/19/2023   23:02:51  ( -70.14,  10.86)    2.82                47
 01/19/2023   23:52:47   (  69.99, 178.35) 01/19/2023   23:52:18  (  70.02, 178.34)    3.11                29