Multiview data could be obtained from the following two articles:

MSTAR: H. Zhang, N. M. Nasrabadi, Y. Zhang, and T. S. Huang, “Multi-view automatic target recognition using joint sparse representation,” IEEE Transactions on Aerospace and Electronic Systems, vol. 48, no. 3, pp. 2481–2497, 2012.

SAR-ACD: X. Sun, Y. Lv, Z. Wang, and K. Fu, “SCAN: Scattering characteristics analysis network for few-shot aircraft classification in high-resolution SAR images,” IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1–17, 2022.