Yes, the effect can be estimated quite easily. Also, keep in mind that the 0.13 nV is the RMS noise, so the peak to peak excursions can be around six times that, or almost 1 nV p-p. If the FS is 1 mA, then it's about 1 ppm - one count on a six digit DVM, or ten times more with each additional digit.

But that will be a heck of a lot easer than estimating the long term ageing rate of a constant on part that is in an uncontrolled environment to 1PPM / year. For the long term reference part, one thing to consider is to use the average of say 10 aged and selected zeners.

I'm going to make estimates by doing some math later but you couldn't go 2 sec without a Swainson's Thrush, and double-digit Gray-cheek including one higher pitched bird that may have been Bicknell's. We'll see if my iPhone spectrogram image will be enough to distinguish.

Lukaszek: 1/19/2013 - Middletown, right hand side of Rte 9S just north of Arrigoni Bridge -- adult Bald Eagle perched at top of tree, around 125pm; Preston, Rte 2, just east of Ross Rd, HUGE flock of blackbirds flying south over Rte 2, some also perched in trees on both sides of road, around 4pm, could not stop to identify individual species in flock, rough estimate

Estimates were $12 billion on birding trips and $24 billion on equipment with $6 billion going to State tax revenue and $4 billion in Federal tax revenue. 28% of CT folks participate in birding related activities. Is it time to make our voices heard and promote CT as an Important Birding Hot Spot for residents and tourists alike?

In May 1985 there were estimates of up to 12 in the area, and on 16 May 1987 I saw one at Pedricktown (white) and one at nearby Stow Creek (chestnut). This event eventually tailed off, but at the time it raised speculation (but no proof that I know of) about a breeding population somewhere in the Canadian Maritimes.

The Silver Sands proposal, which is currently estimated to cost $10 million, has been in the works for some time now. Public hearings held in Milford attracted hundreds of town residents.

Please be sure to estimate your time spent in the field in your reports to help track level of effort.

Based upon past experience an estimate would be between 5 and 10 thousand.

Since 1998, spring surveys conducted throughout eastern Canada and the northeastern US every year haveprovided reliable annual estimates of the breeding population size of eastern mallards.