[pct-l] Temperature Ranges Temp Buttons
Bill Batchelor
billbatch at cox.net
Thu Feb 15 14:42:39 CST 2007
Yea, I was afraid that the number of total days may be incorrect. Now, if
the I-buttons are taking readings off the trail, they will of course be in
there. I took all the data and /24 for one each hour. I did not want to go
through the data and try to literally count the # of date changes and I
could not find a way to get excel to do it for me (I am sure it could be
done, I just got impatient).
As for the top temperatures, I am sure there are anomalies in their as well.
I was much more interested in the cold days since, like Monty pointed out,
this is very useful in gear determination. So, I looked for the cold day
anomalies. I have not trimmed out the hot days.
Very useful information. This really reaffirmed that my current 28 degree
bag will work fine. If I need to spend a couple nights uncomfortable, so be
it. However, on those nights I can use my ground sheet as another blanket
to make up the difference - a dirty night perhaps going directly pad to
ground, but better for my style than hauling a heavier bag for those rare
occasion.
Best!
Is it April yet?
_____
From: jeff.singewald at comcast.net [mailto:jeff.singewald at comcast.net]
Sent: Thursday, February 15, 2007 7:56 AM
To: Adam Bradley; Bill Batchelor; 'Andrew McDavid'
Cc: pct-l at mailman.backcountry.net
Subject: Re: [pct-l] Temperature Ranges Temp Buttons
Bill,
I would agree with Adam on this. When Patch provided us with the I-Buttons
he requested our anticipated start dates and programmed the I-Buttons to
start several days before to ensure that we had accurate readings from the
start. I believe Patch indicated that the buttons would hold 5 months worth
of data so it is likely that the readings may include off-trail days both at
the start and end of our hikes.
I am also in the process of mapping out the specific locations with the aid
of my trail journal. I will say that the Button readings were quite
accurate on the low-end. The coldest night I spent was the night before
Mather Pass at 11,000 feet. I recall this was on June 16th and we literally
made camp on a small rock outcropping sticking out out from the vast fields
of snow. No way to secure our tents so the Three Amigos cowboy camped and
spent one very cold night on the trail!
I see alot of inconsistencies on the high end of the readings though. While
I had some days in excess of 100 degrees, I don't think the 150 degree
readings were realistic :).
I will share more on this data mapping in the next several weeks when I have
it done.
Elevator
-------------- Original message --------------
From: Adam Bradley <tooloouk79852 at yahoo.com>
> Hello Bill,
> Just a heads up on the iButton data. I received my
> iButton several weeks before I started my trip (May
> 15th). I noticed you had me down at 200+ which should
> be more like 144 days out on trail. With 34 zero days
> that brings actual trail days to 110. I am sure there
> are some of the other hikers who also got their
> iButtons early too so your average hiker days is
> incorrect.
> I have since loaded the data into a spreadsheet and
> made a graph out of it. I am now working on putting
> in exact location of the readings at camp each night,
> and elavation. Looking at it as a graph from Campo to
> Manning is very interesting to me as one can see how
> the temperatures rise in certain areas and trend to
> drop the further north one makes it into fall.
>
> Take care,
> adam or EL MONSTRO
> --- Bill Batchelor wrote:
>
> > Average Hiker 184 days. By each hiker I put their
> > days below. To make that
> > easy, I just took the total numer of records for the
> > hiker and divided by
> > 24. Most days had all 24 records. So, this is a
> > fair and quick way to get
> > a pretty good count.
> >
> >
> >
> > _____
> >
> > From: Andrew McDavid
> > [mailto:andrew.n.mcdavid at gmail.com]
> > Sent: Wednesday, February 14, 2007 8:57 AM
> > To: Bill Batchelor
> > Cc: pct-l at mailman.backcountry.net
> > Subject: Re: [pct-l] Temperature Ranges Temp Buttons
> >
> >
> > Do you know how many nights total e ach hiker
> > accrued?
> >
> >
> > On 2/13/07, Bill Batchelor
> > wrote:
> >
> >
> > I did some analysis of the temperature experiences
> > of the five hikers that
> > carried those little temp log devices in 2006. I
> > found it very interesting.
> >
> > These devices took a reading every hour. These
> > hikers were not together, so
> > the readings are from very different experiences and
> > places. This variation
> > makes the data all the more useful.
> >
> > Some of the data is obviously anomalous (the
> > anomalies seemed to be related
> > to one hiker in particular). The anomalies are easy
> > to spot where the
> > temperature fluctuates too wildly in an hour like
> > this 89, 92, 12, 93, 89,
> > 86. So, I remo ved the anomalies.
> >
> > I was curious to see the number of nights around or
> > below freezing. Here is
> >
> > what I found.
> >
> > A couple hikers had nights around 20, though no more
> > than two nights each.
> > These were very rare and were probably avoidable if
> > they wanted to "hike
> > high, camp low".
> >
> > Here are the numbers that I chose to look at:
> >
> > A = # of nights at or below 35
> > B = # of nights at or below 32
> > C = # of nights at or below 30
> > D = # of nights at or below 26
> >
> > The numbers are collective and include all the
> > nights in the lower temp
> > groups. So, item A at "below 35" is a total
> > including the nights below 32,
> > below 30, below 26. Hence, item A includes all of
> > A,B,C &D. B includes all
> > of B,C&D. C includes C&D.
> >
> > AVERAGE HIKER IN GROUP
> > days 184
> > A 7
> > B 3.5
> > C 2.5
> > D 1.5
> >
> > ADAM
> > 232
> > A 8
> > B 4
> > C 2
> > D 2
> >
> > MATT C
> > 178
> > A 1
> > B 0
> > C 0
> > D 0
> >
> > ROBERT
> > 200
> > A 5
> > B 2
> > C 2
> > D 1
> >
> > MICHAEL
> > 145
> > A 15
> > B 10
> > C 5
> > D 3
> >
> > MATT M
> > 191
> > A 5
> > B 0
> > C 0
> > D 0
> >
> > JEFF
> > 159
> > A 8
> > B 6
> > C 5
> > D 4
> >
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