Others have said it and I will add my two cents as well.
If you have a fiberglass roof, or even fiberglass front cap, the satellite radio antenna does not have to be mounted on the outside of the coach.
We are satellite radio junkies and, in addition to having them in all our cars, we have a Sirius Boombox that uses a Sirius Sportster 5 as the receiver.
That same Sirius Sportster 5 is used as the satellite receiver in the motorhome, mounted to the dash with a modified SiriusXM Dock & Play Vehicle Kit and plugged into the AUX input on the in-dash radio. (It's also used on the two home audio systems using SiriusXM Dock & Play Home Kits.)
The antenna is mounted INSIDE the RV on a metal stud/support for the front cap cabinets with the cabling run behind the trim on the driver's side A-pillar.
The system works perfectly and except when passing under long overpasses or other overhead obstructions, the reception never cuts out.
As an aside, this same system was used in our past Coachman Class-C, also with the antenna mounted inside, and it worked perfectly there as well.
2005 Winnebago Sightseer WFD30B "rigged for night" with red LED lighting for night adapted vision.
Do you remember when the sky was dark, and the stars were bright?The International Dark-Sky AssociationAmerican by birth...Scottish by the Grace Of God.