Instrument Type	PI	Period and coverage	References
Post-Agung period (1963-1968)
Balloon-borne OPC25/dust-sondes, Minneapolis, Panama Canal (Panama), Churchill (Canada)
Dust-sonde (same design as OPC25 in Laramie soundings) with 1 or 2 size channels: N(diameter, Dp>275nm/300nm), N(Dp>375nm/450nm)	James Rosen (University of Wyoming)	Minneapolis (45°N): 2 soundings in 1963 (20^th Aug and 9^th Nov 1963) 4 soundings in 1964 (11^th Jan, 5^th May, 19^th Aug, 29^th Oct 1964) 4 soundings in 1965 (28^th Apr, 22^nd Jul, 12^th Oct, 22^nd Dec 1965) 1 sounding in 1966 (7^th Jun 1966) 2 soundings in 1967 (12^th Jul 1967, 31^st Aug 1968) 1 sounding in 1968 (23^rd Jan 1968) Panama Canal Zone (9°N) 2 soundings in 1966 (12^th and 14^th Sept 1966) 2 soundings in 1968 (27^th and 30^th June 1966) Churchill, Canada (59°N): 2 soundings in 1966 (27^th and 30^th June 1966)	Rosen, J. M. (1964): The Vertical Distribution of Dust to 30km, J. Geophys. Res., 69 (21), 4673-4767 Rosen, J. M. (1968): Simultaneous Dust and Ozone Soundings over North and Central America, J. Geophys. Res., vol. 73, no. 2, 479-486.
Balloon-borne solar extinction measurements, Minneapolis and Panama Canal (Panama)
4-telescope instrument to measure solar extinction at 4 wavelengths (367nm, 430nm, 595nm and 910nm). The solar near-infra-red channel (910nm) measured aerosol extinction directly and the data is shown in Figures in the Annexe to Ted Pepin’s (1970) PhD thesis.	Ted Pepin (University of Wyoming)	Minneapolis (45°N): 2 soundings in July 1965 (13^th & 28^th July 1965) 1 sounding in November 1965 (20^th Nov 1965) 1 sounding in July 1966 (29^th July 1966) 2 soundings in Aug 1966 (3^rd and 24^th Aug 1966) 2 soundings in Sep 1966 (6^th and 15^th Sep 1966) 2 soundings in Dec 1966 (23^rd & 30^th Dec 1966) 1 sounding in January 1967 (19^th Jan 1967) 2 soundings in Feb 1967 (1^st and 24^th Feb 1967) 1 sounding in March 1967 (10^th Mar 1967) 3 soundings in April 1967 (1^st , 12^th and 18^th Apr) 1 sounding in May 1967 (10^th May 1967) 1 sounding in June 1967 (21^st June 1967) 1 sounding in July 1967 (12^th July 1967) 1 sounding in January 1968 (18^th Jan 1968) Panama Canal Zone (9°N) 1 sounding in 1966 (14^th Sept 1966)	Pepin, T. J. (1970): “The use of extinction from high altitude balloons as a probe of the atmospheric aerosols”, Annexe to the PhD thesis of Ted Pepin, Univ, Wyoming, pp. 30-94. http://homepages.see.leeds.ac.uk/ ~amtgwm/TedPepin_PhDthesis Part2_UnivWyoming1970.pdf
Ground-based lidar, Lexington Massachusetts (42°N) and College, Alaska (65°N)
Ruby lidar (694nm)	Giorgio Fiocco, MIT, deceased (backscatter ratio profiles tabulated in Gerald Grams PhD thesis)	Lexington, Massachusetts (42°N): 1964: Jan (2), Feb (4), Apr (10), May (7), Oct (3), Nov (9), Dec (3) 1965: Jan (3), Feb (7), Mar (11), Apr (2), May (2), Jun (1), Jul (2) College, Alaska, USA (65°N): 1964: Jul (2), Aug (7)
Searchlight measurements of Agung aerosol extinction (550nm) from New Mexico, USA (32°N)
US Army 60-inch anti-aircraft searchlight (General Electric Company model 1942) and 8-inch photo-multiplier detector (type C7140), see Elterman (1951) Vertical profiles of scattered signals from searchlight using broadband emission (designed for density measurements) conducted at Albuquerque, New Mexico, USA). Needs reprocessing (with searchlight algorithms) for single-wavelength aerosol scattering.	Louis Elterman, deceased (AFCRL, Bedford, Massachusetts - n.b. Elterman (1966) “Atlas of aerosol attenuation” has Figures of 105 vertical profiles of the aerosol attenuation and extinction coefficients at 550nm derived from searchlight measurements conducted at Albuquerque, New Mexico. Data will need to be digitized).	1963: Dec (22 profiles) 1964: Feb (12 profiles), Mar (6 profiles), April (28 profiles), May (9 profiles), Jun (8 profiles), Jul (3 profiles), Sept (2 profiles), Oct (6 profiles), Nov (4 profiles), Dec (5 profiles) Also around 60 searchlight soundings in 1965 and 40 in 1970 (see Elterman et al., 1973, Table 1)	Elterman, L. (1951): The measurement of stratospheric density distribution with the searchlight technique, J. Geophys. Res., 56, 509-520. Elterman, L. (1966): An atlas of aerosol attenuation and extinction profiles for the troposphere and stratosphere, US Air Force Cambridge Research Laboratories report, AFCRL, 66-828. Elterman, L. (1966): Aerosol measurements in the troposphere and stratosphere, Applied Optics, vol. 5, no. 11, 1769-1776. Elterman, L., Wexler, R and Chang, D. T. (1969): Features of tropospheric and stratospheric dust, Applied Optics, vol. 8, no. 5, 893-903. Elterman, L., Toolin, R. B. and Essex, J. D. (1973): Stratospheric aerosol measurements with implications for global climate, Applied Optics, vol. 12, no. 2, 330-337.
High-altitude airborne in-situ impactor samples from 1963-65 Project Stardust U-2 flights
U-2 impaction-type particle collector samples – impaction onto surfaces of carbon on nitrocellulose film on electron-microscope specimen grids (see Stebbins, 1961 and Mossop, 1965 for details on the instrumentation and analysis methods).	James Friend, deceased (Isotopes Inc, Westwood, New Jersey, USA)	Size distribution of Agung aerosol measured on 3 NH flights (May, Jun, Aug 1963) (see Table 3 of Friend, 1966) and on 12 SH flights in sub-tropics and mid-latitudes 1963/4): 3 Northern Hemisphere mid-latitude U-2 flights: sample 266: 7^th May 1963 (31°N-33°N); sample 268: 30^th July 1963 (32°N-33°N); sample 271: 13^th Aug 1963 (32°N-32°N) 8 Southern Hemisphere sub-tropical U-2 flights: sample xx1 : 11^th Apr 1963 (15°S-35°S); sample xx2: 14^th May 1963 (19°S-32°S); sample xx3: 28^th May 1963 (18°S-25°S); sample xx4: 11^th Jun 1963 (21°S-28°S); sample xx5: 9^th Jul 1963 (15°S-21°S); sample xx6: 6^th Aug 1963 (15°S-21°S); sample xx7: 12^th Dec 1963 (15°S-19°S); sample xx8: 2^nd Apr 1964 (15°S-18°S) 8 Southern Hemisphere mid-latitude U-2 flights: sample yy1 : 7^th May 1963 (41°S-44°S); sample yy2: 21^st May 1963 (40°S-44°S); sample yy3: 4^th Jun 1963 (41°S-45°S); sample yy4: 18^th Jun 1963 (40°S-45°S); sample yy5: 3^rd Jul 1963 (40°S-44°S); sample yy6: 30^th Jul 1963 (41°S-44°S); sample yy7: 3^rd Dec 1963 (43°S-44°S); sample yy8: 7^th Apr 1964 (41°S-45°S)	Feely, H. W., Katzman, D., Seitz, H., Davidson, B. and Friend, J. P.: Final report on Project Stardust, vol. 1 (ch 1-6) Oct 1967, DASA report 2166, https://apps.dtic.mil/dtic/tr/fulltext/u2/850378.pdf Friend, J. P. (1966): Properties of the stratospheric aerosol, Tellus, 18, 465-473. Stebbins, A. (1961): DASA report 539, see section 3 “Natural Stratospheric Dust” pages 20-36. https://apps.dtic.mil/dtic/tr/fulltext/u2/606132.pdf Mossop, S. C. (1964): Volcanic dust collected at an altitude of 20km, Nature, 203, 824-827.