[Q] origin of the name, "Arkestra"

For some time I have been intrigued about the name of Horace Tappscott's big band. Its name is Pan-African People's Arkestra. Using the name "Arkestra" is purely intentional, one article I recently came across says. Why? Does Tappscott devoted to Ra? And is there other group calling themselves "Arkestra"?

Also, what is the origin of the word? I always think it is Ark + Orchestra but not sure. Would anyone enlighten me about it?

Tsunofuri noriyuki "At last I could convert my money to US $$$... I'll send an order for Kimball's Tape today."