Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 18.  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)
 01/19/2023   23:02:03   ( -70.10,  10.87) 01/19/2023   23:02:50  ( -70.09,  10.80)    3.46                47
 01/19/2023   23:52:47   (  69.99, 178.36) 01/19/2023   23:52:17  (  69.98, 178.29)    2.80                30
 01/22/2023   14:28:26   (  70.84, -41.85) 01/22/2023   14:29:34  (  70.73, -40.00)   68.77                68
 01/22/2023   15:18:55   ( -70.07, 126.70) 01/22/2023   15:19:14  ( -70.07, 126.67)    1.23                19
 01/22/2023   16:09:39   (  69.95, -65.82) 01/22/2023   16:08:41  (  69.96, -65.85)    1.06                58
 01/25/2023   06:45:06   (  70.13,  75.05) 01/25/2023   06:46:09  (  70.11,  75.00)    3.05                63
 01/25/2023   07:35:48   ( -70.04,-117.49) 01/25/2023   07:35:38  ( -70.06,-117.45)    2.65                10
 01/25/2023   08:26:23   (  69.45,  50.68) 01/25/2023   08:25:13  (  69.50,  49.43)   49.20                70
 01/27/2023   23:01:59   (  70.12,-169.16) 01/27/2023   23:02:32  (  70.11,-169.11)    2.59                33
 01/27/2023   23:52:40   ( -69.97,  -1.62) 01/27/2023   23:52:02  ( -70.00,  -1.63)    3.02                38
 01/30/2023   14:28:13   ( -70.49, 138.73) 01/30/2023   14:29:24  ( -70.39, 139.57)   32.90                71
 01/30/2023   15:18:51   (  70.07, -53.31) 01/30/2023   15:18:55  (  70.05, -53.28)    2.03                 4
 01/30/2023   16:09:33   ( -69.97, 114.16) 01/30/2023   16:08:25  ( -69.95, 114.21)    3.14                68