[TangerineSDR] Mag update?

[Julius Madey]

Good morning all.  Betty Zhang at PNI is responding to the request and 
has asked for more information which I have supplied, including some of 
the JJ test comparisons, how I ran the calibration runs I did, data 
reduction, etc.

I would suggest one further item for consideration in getting to a 
useable solution.  If RM3100 temperature turns out to be a concern, 
place the sensor in a small foam insulated box with a proportionally 
controlled heater which maintains the temperature at something just 
above what would be considered the highest environmental temperature 
around the sensor.  That should be relatively simple to do without 
introducing an interfering magnetic field local to the sensor.  Some 
power would be required but with careful design, I would think well 
within 1 watt.

Another possibility would be using peltier effect heat pumps to do the 
same thing, although the technology would probably result is stronger 
local B fields from the peltier device and require more power.  The 
insulated foam box and proportional heater is also probably the cheapest 
approach considering the need to keep overall costs for the expected 
users low.

Regards,
Jules

On 7/31/2020 10:26 AM, David Witten wrote:
> Hyomin,
>
> I'm not certain what the next step should be.  Julius is hoping for 
> further response from PNI on this subject.
>
> If temperature compensation does account for the differences in 
> observed response I would think that the important thing to  do may be 
> to find a way to calibrate out the discrepancy.  Then we can look at 
> insulation to further minimize the effect.
> Calibration will hopefully give us more meaningful values to begin with.
> Insulation will dampen the effect of those behaviors over short timespans.
>
> Fortunately, neither requires changes in the basic circuit, just 
> adjustments to the data collection and device packaging.
>
> Dave
>
> On Fri, Jul 31, 2020 at 9:10 AM Kim, Hyomin <hmkim at njit.edu 
> <mailto:hmkim at njit.edu>> wrote:
>
>     Hi Dave
>     Sorry that I've been out of the loop for a while as I was
>     completely caught up with something else. May I ask you what the
>     current status is?
>
>     I can visit Jenny Jump if there is something that I can do. At
>     this moment, I cannot think of anything that can be fixed from my
>     end.
>
>     If the temperature compensation is the issue, I could install
>     insulations around the sensor.
>
>     Hyomin
>
>
>
>     NJIT logo <https://www.njit.edu/> 	*Hyomin Kim*
>     Assistant Professor
>     Physics
>     Center for Solar-Terrestrial Research
>     Institute for Space Weather Sciences
>     hmkim at njit.edu <mailto:hmkim at njit.edu> • (973) 596-5704
>     https://web.njit.edu/~hmkim/
>     104 Tiernan Hall, 161 Warren Street, Newark, NJ 07102
>

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