Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 16.  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)
 01/17/2023   06:45:11   ( -70.20,-105.05) 01/17/2023   06:46:23  ( -70.16,-104.98)    4.91                72
 01/17/2023   07:35:54   (  70.03,  62.52) 01/17/2023   07:35:50  (  70.06,  62.51)    2.82                 4
 01/17/2023   08:26:34   ( -69.84,-129.88) 01/17/2023   08:25:21  ( -69.89,-130.09)   10.00                73
 01/19/2023   23:02:03   ( -70.10,  10.87) 01/19/2023   23:02:49  ( -70.13,  10.87)    3.41                46
 01/19/2023   23:52:46   (  69.99, 178.35) 01/19/2023   23:52:16  (  69.97, 178.28)    3.65                30
 01/22/2023   14:28:26   (  70.85, -41.86) 01/22/2023   14:29:34  (  70.71, -40.02)   69.12                68
 01/22/2023   15:18:55   ( -70.07, 126.69) 01/22/2023   15:19:14  ( -70.06, 126.65)    2.08                19
 01/22/2023   16:09:39   (  69.96, -65.83) 01/22/2023   16:08:41  (  69.94, -65.86)    2.20                58
 01/25/2023   06:45:06   (  70.15,  75.03) 01/25/2023   06:46:08  (  70.15,  75.05)    0.95                62
 01/25/2023   07:35:48   ( -70.05,-117.51) 01/25/2023   07:35:38  ( -70.04,-117.47)    2.16                10
 01/25/2023   08:26:23   (  69.47,  50.66) 01/25/2023   08:25:13  (  69.48,  49.41)   48.90                70
 01/27/2023   23:01:58   (  70.09,-169.12) 01/27/2023   23:02:32  (  70.08,-169.14)    1.43                34
 01/27/2023   23:52:40   ( -70.00,  -1.65) 01/27/2023   23:52:02  ( -69.98,  -1.65)    2.04                38