The announcer's diction is quite poor; what's being transcribed as
an aceteria improved ryan suborbital sounding rocket
Is almost certainly
a NASA Terrier -Improved Orion suborbital sounding rocket
.
(h/t asdfex)
Terrier-Improved Orion (Wikipedia, Gunter's) is a two-stage, spin-stabilized sounding rocket. "Improved Orion" refers to the upper stage, which has been used as a sounding rocket by itself as well.
Wallops has an article on their website about the June 24 RockOn launch being referred to. (h/t Organic Marble)
The RockOn program is a recurring annual workshop for students to create experiments to fly on sounding rockets; RockOn has used the Terrier-Improved Orion sounding rocket several times before.