This campaign during May 1990 consists of 15 nights of photoelectric measurement obtained at 3 obseratories on 3 continents :

• 0.6 meter telescope at the Xing-Long station of Beijing Observatory, China (Jiang Shi-yang and Li Zhi-ping)
• 0.6 meter Morgan telescope at Lowell Observatory, USA (W. Ostermann)
• 0.5 meter telescope of the mountain station of Ege University, Turkey (M.C. Akan, S. Evren, C. Ibanoglu, V. Keskin, and Z. Tunca)

Publications following this campaign :

• Multiperiod structures of the Delta Scuti star 63 Her (W.M. Ostermann), Delta Scuti Star Newsletter, Issue 4, November 1991
• Multi-period pulsation of the Delta Scuti star 63 Herculis (M. Breger et al), 1994, A&A 289, 162