Interesting Matthew. I had not heard that before. Pure conjecture on my part: Is it possible that this is what the unit is doing that drains the batteries, even when "off"? If so, it still probably couldn't get the data from inside the house. I wonder if it would be a good idea to keep it on the dash of one's car, so that it could access the GPS satellites all day, before a session. Or perhaps have 4 batteries charged and leave it on in the car the afternoon before a nighttime shoot (changing batteries to fresh ones just before the shoot). At least it gives me some things to research and think about.
On Fri, Sep 13, 2013 at 7:51 AM, Matthew Hunt <m...@pobox.com> wrote: > On Thu, Sep 12, 2013 at 8:14 PM, Rob Studdert <distudio.p...@gmail.com> wrote: > >> When it works it seems pretty good but it does take an extraordinarily >> long time to lock sometimes (noticeable when the phone takes seconds) >> and it's really touch on batteries too. > > Getting a fast GPS lock depends on having up-to-date ephemeris data, > which is broadcast by the satellites. A phone is on pretty much all > the time, so it should always have up-to-date ephemeris data. (Also, a > phone could "cheat" by getting ephemeris data from cell towers or the > Internet; I'm not sure if they do that or not.) The O-GPS1 is probably > used less frequently, so it's likely not to have recent ephemeris data > at startup. It might also forget its ephemeris data when the batteries > are removed. Getting an initial fix without ephemeris data can take a > lot longer. > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Nothing is sure but death and Pentaxes. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
