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Pegasus XL/HAPS
Part of Pegasus Family
American air-launched orbital launch vehicle. Five stage version consisting of 1 x L-1011 + 1 x Pegasus XL stage 1 + 1 x Orion 50XL + 1 x Orion 38 + 1 x HAPS

Status: Active. First Launch: 1997-12-23. Last Launch: 2005-04-15. Number: 6 . Payload: 350 kg (770 lb). Thrust: 726.00 kN (163,211 lbf). Gross mass: 23,000 kg (50,000 lb). Height: 17.40 m (57.00 ft). Diameter: 1.28 m (4.19 ft). Apogee: 4,000 km (2,400 mi).

LEO Payload: 350 kg (770 lb).


More at: Pegasus XL/HAPS.

Family: aircraft-launched, orbital launch vehicle. Country: USA. Spacecraft: Orbcomm, Microstar, TERRIERS, DART. Launch Sites: Point Arguello WADZ, Wallops Island DZ. Stages: L-1011, Pegasus XL-1, Pegasus XL-2, Pegasus-3. Agency: OSC.

1997 December 23 - . 19:11 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island DZ. Launch Pad: RW04/22. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • Orbcomm A1 - . Payload: Orbcomm s/n FM5. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25112 . COSPAR: 1997-084A. Apogee: 823 km (511 mi). Perigee: 812 km (504 mi). Inclination: 45.0300 deg. Period: 101.26 min. Plane A. Ascending node 297.7 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A4 - . Payload: Orbcomm s/n FM8. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25115 . COSPAR: 1997-084D. Apogee: 823 km (511 mi). Perigee: 813 km (505 mi). Inclination: 45.0200 deg. Period: 101.26 min. Plane A. Ascending node 300.5 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A2 - . Payload: Orbcomm s/n FM6. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25113 . COSPAR: 1997-084B. Apogee: 822 km (510 mi). Perigee: 813 km (505 mi). Inclination: 45.0300 deg. Period: 101.26 min. Plane A. Ascending node 300.7 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A7 - . Payload: Orbcomm s/n FM11. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25118 . COSPAR: 1997-084G. Apogee: 823 km (511 mi). Perigee: 813 km (505 mi). Inclination: 45.0200 deg. Period: 101.26 min. Plane A. Ascending node 301.2 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A5 - . Payload: Orbcomm s/n FM9. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25116 . COSPAR: 1997-084E. Apogee: 822 km (510 mi). Perigee: 814 km (505 mi). Inclination: 45.0200 deg. Period: 101.26 min. Plane A. Ascending node 301 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A3 - . Payload: Orbcomm s/n FM7. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25114 . COSPAR: 1997-084C. Apogee: 822 km (510 mi). Perigee: 813 km (505 mi). Inclination: 45.0300 deg. Period: 101.26 min. Plane A. Ascending node 301 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A8 - . Payload: Orbcomm s/n FM12. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25119 . COSPAR: 1997-084H. Apogee: 823 km (511 mi). Perigee: 812 km (504 mi). Inclination: 45.0200 deg. Period: 101.26 min. Plane A. Ascending node 301.2 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm A6 - . Payload: Orbcomm s/n FM10. Mass: 43 kg (94 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25117 . COSPAR: 1997-084F. Apogee: 823 km (511 mi). Perigee: 812 km (504 mi). Inclination: 45.0200 deg. Period: 101.26 min. Plane A. Ascending node 301.2 degrees. Air dropped in Wallops Island DZ..

1998 August 2 - . 16:24 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island DZ. Launch Pad: RW04/22. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • Orbcomm B5 - . Payload: Orbcomm s/n FM17. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25413 . COSPAR: 1998-046A. Apogee: 824 km (512 mi). Perigee: 813 km (505 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 61 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B2 - . Payload: Orbcomm s/n FM14. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25419 . COSPAR: 1998-046G. Apogee: 826 km (513 mi). Perigee: 811 km (503 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 60.4 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B3 - . Payload: Orbcomm s/n FM15. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25418 . COSPAR: 1998-046F. Apogee: 825 km (512 mi). Perigee: 812 km (504 mi). Inclination: 45.0100 deg. Period: 101.28 min. Plane B. Ascending node 60 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B4 - . Payload: Orbcomm s/n FM16. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25417 . COSPAR: 1998-046E. Apogee: 825 km (512 mi). Perigee: 812 km (504 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 59.9 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B8 - . Payload: Orbcomm s/n FM20. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25416 . COSPAR: 1998-046D. Apogee: 826 km (513 mi). Perigee: 811 km (503 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 61.2 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B7 - . Payload: Orbcomm s/n FM19. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25415 . COSPAR: 1998-046C. Apogee: 828 km (514 mi). Perigee: 809 km (502 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 61.1 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B6 - . Payload: Orbcomm s/n FM18. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25414 . COSPAR: 1998-046B. Apogee: 827 km (513 mi). Perigee: 810 km (500 mi). Inclination: 45.0000 deg. Period: 101.28 min. Plane B. Ascending node 59.7 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm B1 - . Payload: Orbcomm s/n FM13. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25420 . COSPAR: 1998-046H. Apogee: 824 km (512 mi). Perigee: 813 km (505 mi). Inclination: 45.0000 deg. Period: 101.27 min. Plane B. Ascending node 60.4 degrees. Air dropped in Wallops Island DZ..

1998 September 23 - . 05:06 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island DZ. Launch Pad: RW04/22. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • Orbcomm C1 - . Payload: Orbcomm s/n FM21. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25475 . COSPAR: 1998-053A. Apogee: 825 km (512 mi). Perigee: 811 km (503 mi). Inclination: 45.0100 deg. Period: 101.27 min. Plane C. Ascending node 181.6 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C8 - . Payload: Orbcomm s/n FM28. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25482 . COSPAR: 1998-053H. Apogee: 824 km (512 mi). Perigee: 813 km (505 mi). Inclination: 45.0300 deg. Period: 101.27 min. Plane C. Ascending node 181.7 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C7 - . Payload: Orbcomm s/n FM27. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25481 . COSPAR: 1998-053G. Apogee: 823 km (511 mi). Perigee: 813 km (505 mi). Inclination: 45.0200 deg. Period: 101.27 min. Plane C. Ascending node 181.6 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C6 - . Payload: Orbcomm s/n FM26. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25480 . COSPAR: 1998-053F. Apogee: 825 km (512 mi). Perigee: 811 km (503 mi). Inclination: 45.0100 deg. Period: 101.27 min. Plane C. Ascending node 181.5 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C5 - . Payload: Orbcomm s/n FM25. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25479 . COSPAR: 1998-053E. Apogee: 824 km (512 mi). Perigee: 813 km (505 mi). Inclination: 45.0100 deg. Period: 101.27 min. Plane C. Ascending node 181.5 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C4 - . Payload: Orbcomm s/n FM24. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25478 . COSPAR: 1998-053D. Apogee: 822 km (510 mi). Perigee: 814 km (505 mi). Inclination: 45.0100 deg. Period: 101.27 min. Plane C. Ascending node 181.7 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C3 - . Payload: Orbcomm s/n FM23. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25477 . COSPAR: 1998-053C. Apogee: 823 km (511 mi). Perigee: 813 km (505 mi). Inclination: 45.0200 deg. Period: 101.27 min. Plane C. Ascending node 181.8 degrees. Air dropped in Wallops Island DZ..
  • Orbcomm C2 - . Payload: Orbcomm s/n FM22. Mass: 22 kg (48 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25476 . COSPAR: 1998-053B. Apogee: 823 km (511 mi). Perigee: 814 km (505 mi). Inclination: 45.0200 deg. Period: 101.27 min. Plane C. Ascending node 178 degrees. Air dropped in Wallops Island DZ..

1999 May 18 - . 05:09 GMT - . Launch Site: Point Arguello. Launch Complex: Point Arguello WADZ. Launch Pad: Aircraft from Vandenberg.. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • TERRIERS - . Nation: USA. Agency: NASA Greenbelt. Manufacturer: AeroAstro. Class: Technology. Type: Military technology satellite. Spacecraft Bus: HETE. Spacecraft: TERRIERS. USAF Sat Cat: 25735 . COSPAR: 1999-026A. Apogee: 493 km (306 mi). Perigee: 484 km (300 mi). Inclination: 97.1000 deg. Period: 94.40 min.

    TERRIERS was part of NASA's Student Explorer Demonstration Initiative (STEDI), which was a precursor program to the UNEX (University Explorer) series. STEDI was managed by USRA (the Universities Space Research Association) for NASA, while UNEX was to be more directly managed by NASA-GSFC. TERRIERS was to be operated by the space physics group at Boston University for ionosphere studies, and carried TESS, a set of extreme ultraviolet (EUV) spectrographs to get electron density and thermosphere emission profiles. The GISSMO instrument measured the solar EUV flux. The spacecraft was built by AeroAstro and based on HETE. TERRIERS was placed in the correct orbit, but it failed to orient its solar panel to the Sun and ran out of battery power by May 20. Controllers were optimistic that when its orbit processes to a better sun angle the satellite could be revived. Air dropped in Point Arguello WADZ. Additional Details: here....

  • MUBLCOM - . Mass: 43 kg (94 lb). Nation: USA. Agency: US Army. Manufacturer: Germantown. Class: Communications. Type: Military communications satellite. Spacecraft: Microstar. USAF Sat Cat: 25736 . COSPAR: 1999-026B. Apogee: 745 km (462 mi). Perigee: 738 km (458 mi). Inclination: 97.7000 deg. Period: 99.70 min.

    After deploying the TERRIERS satellite, the conical Payload Adapter Fitting (1998-26E) was jettisoned at 05:21 GMT, leaving the disk-shaped MUBLCOM satellite attached to the Pegasus XL PRIMEX HAPS-Lite stage. The second HAPS burn at 05:22 GMT raised apogee to 775 km, followed by a third, apogee burn at 06:10 GMT which circularised the orbit. MUBLCOM was deployed to a 769 km x 776 km x 97.7 degree orbit. The final HAPS burn then placed the depleted HAPS stage in a lower 388 km x 722 km x 97.1 degree disposal orbit. MUBLCOM (Multiple beam Beyond Line-of-sight Communications) was an experimental satellite funded by DARPA and managed by the US Army's Communications-Electronics Command (CECOM) at Ft Monmouth, New Jersey. It was built by Orbital Sciences using the Microstar (Orbcomm type) bus and carries a payload testing hand-held radio satellite communications for the armed forces.

    Six years later MUBLCOM was the target for the DART Autonomous Rendezvous Technology mission. On April 16, 2005, DART closed within 100 m of MUBLCOM satellite, then evidently began a series of out-of-control maneuvers resulting in an in-space collission and MUBLCOM being bumped into a 3 to 5 km higher orbit. DART was deorbited while MUBLCOM, still functioned, continued on in space. Air dropped in Point Arguello WADZ.


1999 December 4 - . 18:53 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island DZ. Launch Pad: RW04/22. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • Orbcomm FM30 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25980 . COSPAR: 1999-065A. Apogee: 798 km (495 mi). Perigee: 790 km (490 mi). Inclination: 45.0000 deg. Period: 100.70 min. Seven Orbcomms launched, rather than eight as on previous flights. Air dropped in Wallops Island DZ..
  • Orbcomm FM33 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25983 . COSPAR: 1999-065D. Apogee: 793 km (492 mi). Perigee: 780 km (480 mi). Inclination: 45.0000 deg. Period: 100.60 min. Air dropped in Wallops Island DZ..
  • Orbcomm FM31 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25981 . COSPAR: 1999-065B. Apogee: 798 km (495 mi). Perigee: 790 km (490 mi). Inclination: 45.0000 deg. Period: 100.70 min. Air dropped in Wallops Island DZ..
  • Orbcomm FM32 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25982 . COSPAR: 1999-065C. Apogee: 798 km (495 mi). Perigee: 788 km (489 mi). Inclination: 45.0000 deg. Period: 100.70 min. Air dropped in Wallops Island DZ..
  • Orbcomm FM34 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25984 . COSPAR: 1999-065E. Apogee: 795 km (493 mi). Perigee: 792 km (492 mi). Inclination: 45.0000 deg. Period: 100.70 min. Air dropped in Wallops Island DZ..
  • Orbcomm FM36 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25986 . COSPAR: 1999-065G. Apogee: 797 km (495 mi). Perigee: 790 km (490 mi). Inclination: 45.0000 deg. Period: 100.70 min. Air dropped in Wallops Island DZ..
  • Orbcomm FM35 - . Mass: 45 kg (99 lb). Nation: USA. Agency: Orbcomm. Manufacturer: Germantown. Program: Orbcomm. Class: Communications. Type: Civilian communications satellite. Spacecraft Bus: MicroStar. Spacecraft: Orbcomm. USAF Sat Cat: 25985 . COSPAR: 1999-065F. Apogee: 797 km (495 mi). Perigee: 791 km (491 mi). Inclination: 45.0000 deg. Period: 100.70 min. Air dropped in Wallops Island DZ..

2005 April 15 - . 17:26 GMT - . Launch Site: Point Arguello. Launch Complex: Point Arguello WADZ. Launch Pad: Aircraft from Vandenberg.. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL/HAPS.
  • DART - . Mass: 360 kg (790 lb). Nation: USA. Agency: NASA. Manufacturer: OSC. Class: Technology. Type: Rendezvous technology satellite. Spacecraft: DART. Decay Date: 2016-05-07 . USAF Sat Cat: 28642 . COSPAR: 2005-014A. Apogee: 747 km (464 mi). Perigee: 395 km (245 mi). Inclination: 96.6000 deg. Period: 96.10 min.

    Delayed from April 15; October 18, 19, 26, 28; Nov. 4, 9 and 11; 2004, and March 2, 2005. Autonomous Rendezvous Technology mission, planned to guide itself to within a few metres of a US satellite. On April 16, DART closed within 100 m of the MUBLCOM satellite, then evidently began a series of out-of-control maneuvers resulting in an in-space collission and MUBLCOM being bumped into a 3 to 5 km higher orbit. Remarkably both satellites continued to function. DART then detected that it was running unexpectedly low on nitrogen cold gas used for orientation. Its autonomous software aborted further rendezvous operations and the DART was deorbited shortly thereafter. Air dropped in Point Arguello WADZ.



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