Simultaneous Nadir Overpasses (SNOs) between NPP and TERRA
TLE Epoch: 2021 5 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)
 05/19/2021   02:04:55   ( -68.51, -32.89) 05/19/2021   02:05:18  ( -68.52, -32.95)    2.98                23
 05/19/2021   02:55:40   (  68.44, 134.51) 05/19/2021   02:54:45  (  68.41, 134.56)    3.28                55
 05/21/2021   17:31:11   (  68.64, -84.62) 05/21/2021   17:32:14  (  68.64, -84.57)    1.98                63
 05/21/2021   18:21:52   ( -68.49,  82.89) 05/21/2021   18:21:45  ( -68.47,  82.87)    2.31                 7
 05/21/2021   19:12:29   (  67.99,-109.16) 05/21/2021   19:11:18  (  68.02,-110.02)   36.17                71
 05/24/2021   09:48:06   (  68.57,  31.23) 05/24/2021   09:48:40  (  68.58,  31.24)    0.64                34
 05/24/2021   10:38:47   ( -68.42,-161.25) 05/24/2021   10:38:11  ( -68.42,-161.32)    2.87                36
 05/27/2021   01:14:24   ( -68.94, -20.81) 05/27/2021   01:15:36  ( -68.85, -20.18)   27.00                72
 05/27/2021   02:05:02   (  68.51, 147.08) 05/27/2021   02:05:07  (  68.51, 147.04)    1.67                 5
 05/27/2021   02:55:44   ( -68.41, -45.47) 05/27/2021   02:54:37  ( -68.41, -45.45)    1.02                67
 05/29/2021   17:31:15   ( -68.61,  95.40) 05/29/2021   17:32:06  ( -68.62,  95.41)    0.81                51
 05/29/2021   18:21:59   (  68.50, -97.14) 05/29/2021   18:21:33  (  68.49, -97.10)    2.21                26
 05/29/2021   19:12:25   ( -67.54,  71.38) 05/29/2021   19:11:17  ( -67.61,  69.51)   79.86                68
 06/01/2021   08:57:43   (  69.40,  42.76) 06/01/2021   08:58:51  (  69.30,  44.53)   70.45                68
 06/01/2021   09:48:11   ( -68.55,-148.75) 06/01/2021   09:48:33  ( -68.54,-148.80)    2.05                22
 06/01/2021   10:38:55   (  68.44,  18.70) 06/01/2021   10:38:00  (  68.41,  18.69)    3.27                55