Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 7 17.  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)
 07/17/2025   05:55:10   (  70.30,  87.23) 07/17/2025   05:56:21  (  70.22,  87.51)   13.88                71
 07/17/2025   06:45:49   ( -70.05,-105.07) 07/17/2025   06:45:52  ( -70.05,-105.09)    0.83                 3
 07/17/2025   07:36:32   (  69.88,  62.49) 07/17/2025   07:35:20  (  69.89,  62.33)    6.43                72
 07/19/2025   22:12:03   (  70.14,-156.77) 07/19/2025   22:12:53  (  70.15,-156.71)    2.17                50
 07/19/2025   23:02:45   ( -70.05,  10.70) 07/19/2025   23:02:23  ( -70.04,  10.77)    2.83                22
 07/19/2025   23:53:12   (  69.03, 179.48) 07/19/2025   23:52:06  (  69.05, 177.08)   95.59                66
 07/22/2025   14:28:58   (  70.10, -40.93) 07/22/2025   14:29:24  (  70.12, -40.88)    2.80                26
 07/22/2025   15:19:40   ( -70.00, 126.54) 07/22/2025   15:18:54  ( -70.01, 126.61)    3.30                46
 07/25/2025   05:55:13   ( -70.42, -92.97) 07/25/2025   05:56:25  ( -70.29, -92.38)   25.88                72
 07/25/2025   06:45:52   (  70.06,  74.90) 07/25/2025   06:45:54  (  70.07,  74.94)    2.03                 2
 07/25/2025   07:36:34   ( -69.95,-117.62) 07/25/2025   07:35:24  ( -69.97,-117.57)    3.18                70
 07/27/2025   22:12:03   ( -70.11,  23.27) 07/27/2025   22:12:58  ( -70.13,  23.26)    1.76                55
 07/27/2025   23:02:47   (  70.03,-169.28) 07/27/2025   23:02:25  (  70.01,-169.26)    1.76                22
 07/27/2025   23:53:15   ( -69.17,  -0.71) 07/27/2025   23:52:07  ( -69.25,  -2.66)   77.49                68
 07/30/2025   14:28:58   ( -70.08, 139.10) 07/30/2025   14:29:29  ( -70.06, 139.04)    3.12                31
 07/30/2025   15:19:42   (  69.99, -53.47) 07/30/2025   15:18:55  (  69.99, -53.41)    2.20                47