abres

Atlas 151F payload: MBRV-2 (MBRV = Maneuvering Ballistic Reentry Vehicle). Launched March 16, 1967, from Vandenberg AFB pad 576A2. This was a successful flight but the vehicle was not recovered due to a failure of the recovery system. At the time, the Aerospace Corporation described the test results: "The first vehicle capable of intentional deviation from a ballistic trajectory during reentry was successfully flown from Vandenberg AFB to Kwajalein." Source: Chapter 3 of "Lightning Bolts: First Manuevering Reentry Vehicles", by William Yengst, 2010, ISBN 978-1-61566-547-1.

Convair S/N 151F USAF S/N 62-12623 No. painted on missile: 623 Acceptance date: Jan 1965 Delivery date: unknown Launch date: 16 Mar 1967 Launch site: ABRES A-2 Mission: ABRES - Sleigh Ride / MBRV-2

Atlas 119F payload was BGRV-2 (BGRV = Boost Glide Reentry Vehicle). Launched May 19, 1967, at 2:00 pm PST, from pad 576A1 at Vandenberg AFB. The test failed during or shortly after separation of the payload from the booster.
Source: Chapter 4, esp. p. 123, of "Lightning Bolts: First Manuevering Reentry Vehicles", by William Yengst, 2010, ISBN 978-1-61566-547-1.

what different between bgrv and sbgrv？

Convair S/N 245D USAF S/N 62-12432 Acceptance date: 29 Feb 1964 Delivery date: 11 Mar 1964 Launched 15 Sep 1964 from 576A-1 Mission: ABRES (LORV-3)