I had use of a pair of Topcon Hiper + for a while a couple of years ago. They had the capacity to store collected data - if you had paid for that feature to be unlocked. The owner of the units had not.?ÿ So no storage for OPUS.?ÿ ?ÿ
My first GPS experience with GPS was in the late '90s with some Leica units whose model number I cannot now recall. They had no onboard storage, any storage was on PCMCIA cards in the the controller. We had 2 Mb cards which were said to cost several hundred dollars.?ÿ We usually operated these is static mode, but they could do RTK without storing sat data.?ÿ If you had them working all day in RTK it would be quite possible to fill up the cards with static data, leaving no room for the collected RTK vectors and coordinates. So sometimes compromises had to be made.?ÿ
As I recall, I may be a bit wrong, (it was a loooong time ago) the units had no memory for collecting, or maybe you had to pay extra to unlock the memory. Anyway, they were RTK only, no way to do static. That change soon after as we acquired static GPS. But I clearly remember the job, carrying around the backpack, cords everywhere, the chicken bucket changed all that.
1997 was still early days for GPS, but not the beginning. This is right about the time I got involved with it. RTK was a real thing. Memory space for static files was always an issue to be managed. 1 or 2 Mb storage cards cost several hundred dollars. Today you can buy thumb drives with several thousand times more capacity from the checkout line in Target for $5.
