Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 4 19.  Predictions up to the next  14.0 days:

     Date     Time(NPP) NPP Lat/Lon Date Time(TERRA) TERRA Lat/Lon    Distance(km)  Time Diff(sec)
 04/19/2021   18:21:39   ( -68.49,  82.93) 04/19/2021   18:22:14  ( -68.52,  82.92)    3.28                35
 04/19/2021   19:12:23   (  68.36,-109.58) 04/19/2021   19:11:42  (  68.36,-109.63)    1.87                41
 04/22/2021   09:47:56   (  68.90,  30.85) 04/22/2021   09:49:07  (  68.81,  31.53)   28.68                71
 04/22/2021   10:38:32   ( -68.50,-161.30) 04/22/2021   10:38:41  ( -68.48,-161.25)    2.83                 9
 04/22/2021   11:29:15   (  68.31,   6.25) 04/22/2021   11:28:09  (  68.31,   6.19)    2.41                66
 04/25/2021   02:04:43   (  68.53, 147.11) 04/25/2021   02:05:39  (  68.53, 147.06)    2.04                56
 04/25/2021   02:55:25   ( -68.45, -45.46) 04/25/2021   02:55:09  ( -68.43, -45.43)    2.88                16
 04/25/2021   03:45:56   (  67.62, 122.89) 04/25/2021   03:44:47  (  67.70, 121.36)   65.22                69
 04/27/2021   18:21:37   (  68.55, -97.13) 04/27/2021   18:22:06  (  68.53, -97.06)    3.52                29
 04/27/2021   19:12:17   ( -68.36,  70.44) 04/27/2021   19:11:37  ( -68.37,  70.38)    3.06                40
 04/30/2021   09:47:52   ( -68.95,-149.20) 04/30/2021   09:49:03  ( -68.81,-148.48)   32.81                71
 04/30/2021   10:38:29   (  68.46,  18.76) 04/30/2021   10:38:34  (  68.47,  18.74)    1.02                 5
 04/30/2021   11:29:11   ( -68.37,-173.80) 04/30/2021   11:28:04  ( -68.37,-173.75)    2.33                67
 05/03/2021   02:04:38   ( -68.60, -32.95) 05/03/2021   02:05:33  ( -68.58, -32.89)    3.07                55
 05/03/2021   02:55:21   (  68.43, 134.58) 05/03/2021   02:55:00  (  68.46, 134.61)    2.68                21