¹ Minutes of the First Meeting of the Technical Panel on Earth Satellite Program, 20 Oct 1955, and attachment 1 (hereafter cited as min mtg TPESP); National Academy of Sciences-National Research Council, Report on the U.S. Program for the International Geophysical Year, IGY General Report, No. 21 (IGY World Data Center A Series), November 1965, p. 553 (hereafter cited as IGY Report 21) .

² Min 1st mtg TPESP, pp. 3-4, and attachment 2.

³ Minutes, ad hoc mtg on Earth Satellite Program Budget, 10 Nov 1955; min. 2d mtg TPESP, 21 Nov 1955, and attachments la and lb.

⁴ Senate, Committee on Appropriations, Hearings, Second Supplemental Appropriation Bill, 1956, 84th Cong., 2d Sess., 21 Mar 1956, p. 209.

⁵ Interview, John Hagen, 17 Mar 1967. Min 1st mtg TPESP, 20 Oct 1955, p. 5; 2d mtg, 21 Nov 1955, pp. 2-3; and 4th mtg, 8 Mar 1956, p. 1.

⁶ Min 3d mtg TPESP, 28 Jan 1956, p. 2; and 4th mtg, 8 Mar 1956, pp. 3-4.

⁷ Senate, Committee on Appropriations, Hearings, Second Supplemental Appropriation Bill, 1956, 84th Cong., 2d Sess., 21 Mar 1956, pp. 220-224; House, Committee on Appropriations, Subcommittee on Independent Offices, ibid., 8 Mar 1956, pp. 428, 434, 444-464.

⁸ Min 5th mtg TPESP, 20 Apr 1956, pp. 1-2; interview, Kaplan, 12 Feb 1968; Detlev Bronk, speech at the Vanguard tenth anniversary dinner, 16 Mar 1968.

⁹ Min 2d mtg TPESP, 21 Nov 1955, attachment 2.

¹⁰ Min 1st mtg USNC Executive Committee, 12 Nov 1954, attachment A.

¹¹ Min 3d mtg TPESP, 28 Jan 1956 (pp. 2-3, 5-6, and attachments F and G), 4th mtg, 8 Mar 1956 (pp. 4, 7-10), 6th mtg, 8 Jun 1956 (p. 10); note 3 to NRL B-123, June 1957, Vanguard, Master Plan. For Van Allen's request for a cylinder, see chapter 5, pp. 89-90. For further discussion of the 6.4-inch satellite, see chapter 7, p. 127 and 11, p. 197.

¹² Min 4th mtg TPESP, 8 Mar 1956 (attachment A, p. 2), and 5th mtg, 20 Apr 1956 (p. 2); Funding History of Project Vanguard, encl 2 to NRL, 3001-18, NHF; interview, Thomas E. Jenkins, Vanguard comptroller, 22 Aug 1967.

¹³ Min 6th mtg TPESP, 7-8 June 1956, pp. 2-3, 13-15, and attachment D; ltr, Kaplan to Waterman, 15 June 1956, in folder 31.1, Procurement of Launching Vehicles.

¹⁴ Ltr, Porter to Kaplan, 17 July 1956; Attachment A to Min 7th mtg TPESP, 5 Sept 1957.

¹⁵ E.g., conf rpt, NRL, 24 Feb 1956.

¹⁶ Cover ltr, Porter to Kaplan, 7 Jan 1957, and encl, "Comments on a Continuing Program of Scientific Research Using Earth Satellite Vehicles."

¹⁷ Interview, Alan T. Waterman, 7 Mar 1967; Funding History of Project Vanguard, NRL, 3001-18; Min 7th mtg, TPESP, 5 Sept 1956, pp. 3-4.

¹⁸ Min 7th mtg TPESP, 5 Sept 1956, pp. 4-6, and attachments B and C; 8th mtg, 15 Oct 1956, pp. 2-4, 8. See also chapter 9, pp. 159-160.

¹⁹ Min 6th mtg, 7 June 1956, pp. 8-9; 7th mtg, 5 Sept 1956, pp. 5-6, >

Oct 1956, pp. 2, 4-6; min mtg Working Group on Tracking and Computation, 6 Oct 1956, pp. 1-3.

²⁰ Min 7th mtg TPESP, 5 Sept 1956, pp. 7-8.

²¹ Min 8th mtg TPESP, 15 Oct 1956 (pp. 6-8), and 10th mtg, 7 Feb, 1957 (p. 11); "Information about the participation of the Soviet Union in the Investigation of the Upper Atmosphere by means of Rockets and Satellites," encl to memo, Odishaw to the USNC, Executive Committee, TPESP, and Technical Panel for Rocketry, 27 Sept 1956.

²² Min 8th Mtg TPESP, 15 Oct 1956, pp. 7-8, 9-10, and attachment C.

²³ Min 9th mtg TPESP, 3-4 Dec 1956, pp. 6, 7, 14, 15, and attachments A, B, C, and D; min special session TPESP, 5 Dec 1956, pp. 1-2