CHAPTER II, SECTION 3 This was a User-furnished 10’ diameter dishtype antenna mounted on top of two 12”-diameter 77’-high pipes and located adjacent to Station 23. The poles were mounted in 4’x 6’ x 2’-thick reinforced concrete footings guyed by six 44-inch cables tied to 3’-6”x 3’-6” x 3’-6”deep anchor blocks. Coaxial cable extended from the antenna to the station zero point. Power requirementsconsisted of 1 KW, 120-volt, singlephase which was supplied from the Station 23 source. Timing signals of minus 45 minutes and minus 15 minutes were provided. A total of 16 cubic yards of concrete was poured. STATIONS: PURPOSE: SITES: USER: CONSTRUCTION: OCCUPANCY: 1341.01 thru 1341.12 Detectors Dog thru George LASL 5-2-56/5-4-56 5-4-56 Each station in this series was a 6 foot length of 6” standard pipe driven flush with the grade and capped with a wooden cover which had a lead brick suspended beneath it and a sandbag on top. STATIONS: PURPOSE: SITE: single-phase power and minus 15 minutes, minus 15 seconds, and minus 5 seconds timing signals plus an interlock and spare. STATION: Cloud and Fireball SITE: Yvonne Station 1511 was existing GREENHOUSE Station 77 and consisted of a reinforced concrete structure 4’ x 4’ x 13’-6” long in which three User-furnished photo tubs were mounted. The station faced towards the working point of Stations 6, 7, 19 and 24. Power in the amount of 6 KW, 120-volt, single-phase was supplied from Station 77. Minus 15 minutes, minus 15 seconds, and minus 5 seconds timing signals, an interlock and a spare were required. A total of 15 cubic yards of concrete was used. STATION: PURPOSE: Yvonne SITE: USER: DOD-13 PARTICIPATION: 24 CONSTRUCTION: 3-13-56/3-19-56 These stations were concrete collimating baffles. The Station 1350 baffle was 5’-4” x 196” x 1’-6” thick with a window opening 1’-4” x 9’ Photography USER: DOD-15 PARTICIPATION: 6, 7, 19 and 24 CONSTRUCTION: 3-19-56/3-26-56 1350 and 1351 Collimating Baffles 1511 PURPOSE: 1512 Cloud and Fireball Photography George USER: DOD-15 PARTICIPATION: 10, 11, 12, 13, 18 and 22 CONSTRUCTION: 3-12-56/4-20-56 This station consisted of User-furnished photo tubs mounted on top of Station 1528. Three 1/2’-thick steel plates 2’-7” square were and a round hole 9-7/8 inches in diameter. The baffle was mounted on a concrete slab 5’ x 5’-4” x 1’-8” thick. The Station 1351 baffle was 12’x 22’ x 1’-6” thick with two window openings 2’-6” mounted on the roof of Station 1528 in order to support the photo tubs. Power in the amount of 6 KW, 120-volt, single-phase was required. The baffle was mounted on a slab 6’-6” x 12’ x 1’8’ thick. The center line of the window openings was at elevation plus 17 feet, which was the line of sight between Station 1316 and the working point of Station 24. One baffle was located 50 feet and the other 525 feet away from the front of Station 24. Twelve cubic yards of concrete were poured for Station 1350 and 15 cubic yards for Station 1351. STATIONS: PURPOSE: x 3’ and an opening at the top of 2’-7%” x 8”. STATION: PURPOSE: SITE: 1510 Cloud and Fireball Photography Janet USER: DOD-15 PARTICIPATION: 4, 5 and 23 This station comprised User-furnished photo tubs mounted on existing GREENHOUSEStation 69, requiring 10 KW, 120-volt, Minus 15 minutes, minus 15 seconds, and minus 5 seconds timing signals plus an interlock and spare were provided. SITES: USER: PARTICIPATION: 1513, 1515 and 1516 Cloud and Fireball Photography Wilma, William and How DOD-15 1, 2, 3, 4, 5, 19, 24, 10, 11, 12, 13 and 22 CONSTRUCTION: 12-15-55/5-24-56 These stations were steel towers, 14’ square x 75° high, with an enclosed cab at the 75-foot level. Two sides of the cab contained metal rollup doors which operated by timing signals and closed after the shock wave had passed. Angles were provided in the cab roof to support Userfurnished cameras. Access to the cab was by steel stairs within the tower. Station 1516 was Page 2-91