Both SIRIUS and XM have announced they’ll contribute airplay data for the Billboard Radio Monitor Mainstream Top 40 Chart.

Songs played on Sirius’ its flagship pop music channel, SIRIUS Hits 1, will be included in the airplay charts published in the August 19 issue of Billboard Radio Monitor, and each week thereafter.

XM’s leading Top 40 channel Top 20 on 20 will contribute data to the Billboard Radio Monitor Mainstream Top 40 Chart effective with the magazine dated August 19th as well.