[Isocops] New Nose and Tail
Nathan Schwadron
nschwadron at guero.sr.unh.edu
Mon Mar 11 20:29:25 EDT 2013
Hi All
I have had a request from Dave (see thread below) to change the Nose and Tail directions in out plots.
The needed change is in "make_me_bin_overlay.pro" and I have pasted in the change below. ra[0], dec[0]
and ra[3], and dec[3] below have been modified.
I have committed the change in isoc_dev.
Ken can you make the corresponding change in the production environments?
All: please be aware of the change. Maher, this is especially important for your plotting software.
Nathan
;
; round up the usual suspects for the heliosphere
;
pro make_me_bin_std_hs, $
ips, $ ; IN: common isoc plotting structure
label, $ ; OUT: array of labels
ra, $ ; OUT: array of ra values
dec, $ ; OUT: array of dec values
color ; OUT; array of color indices 0..4
label = strarr(4)
ra = dblarr(4)
dec = dblarr(4)
color = intarr(4) ; zero by default
color = replicate(0, 4) ; if we wanted other than zero
label[0] = "Nose"
label[1] = "V1"
label[2] = "V2"
label[3] = "Tail"
ra[0] = 258.47
ra[1] = 257.22
ra[2] = 297.36
ra[3] = 78.47
dec[0] = -18.02
dec[1] = 12.19
dec[2] = -53.51
dec[3] = 18.02
; transform to requested SPICE frame using ibex_rotate and spawn
if (ips.mapframe ne 'J2000') then begin
transform_ra_dec_arrays,ips,ra,dec
endif
end
Nathan Schwadron
n.schwadron at unh.edu
University of New Hampshire
Morse Hall - Room 354
8 College Road
Durham NH 03824
USA
(603) 862-3451
Hi Herb and Nathan,
Yes – we need to fix this if we are still using other values in our processing of the ENA data. The current values that we should be using for everything are J2000 Ecliptic (longitude, latitude) of (79.00°,–4.98°) from the 2012 Science paper (no Bow Shock) that rectified the small differences between the Möbius and Bzowski ApJS values. That’s what we asked the broader community to do, so that’s what we need to do ourselves. In the future I am sure we will publish further refinements and update these “best” parameters, but for now we need to use these.
Best,
Dave
David J. McComas, Ph.D.
Assistant Vice President
Space Science and Engineering Division
Southwest Research Institute
From: Funsten, Herbert O [mailto:hfunsten at lanl.gov]
Sent: Monday, March 11, 2013 5:22 PM
To: McComas, Dave; Schwadron, Nathan (N.Schwadron at unh.edu)
Subject: FW: Location of nose in IBEX maps
FYI- Good topic for next week, can we please put it on the agenda?
From: Nathan Schwadron [mailto:nschwadron at gmail.com]
Sent: Tuesday, December 11, 2012 6:25 PM
To: Funsten, Herbert O
Cc: fair-play at comcast.net
Subject: Re: Location of nose in IBEX maps
Nose is 254.73 -17.57 in j2000
Which is 255.4 5.1 in ecliptic coords
Sent from my iPad
On Dec 11, 2012, at 7:33 PM, "Funsten, Herbert O" <hfunsten at lanl.gov> wrote:
Hi Nathan-
Just to make sure, what is the current Nose direction on the ISOC maps? I think I was using ecliptic (252,7) a year ago and started using (255,5) for my circularity analysis. I seem to be getting systematic errors of several degrees in the circularity fits.
Thanks!
Herb
From: Nathan Schwadron [mailto:nschwadron at guero.sr.unh.edu]
Sent: Monday, December 10, 2012 7:58 PM
To: Funsten, Herbert O
Cc: fair-play at comcast.net
Subject: Re: Location of nose in IBEX maps
Hi Herb
Making this change is quite easy, but I really think this is a team decision and maybe something to discuss
at the next SWT.
Nathan
On Dec 10, 2012, at 6:30 PM, Funsten, Herbert O wrote:
Hi Ken and Nathan-
I think that the Nose direction in the ISOC maps is (255, 5) ecliptic. Eberhard’s papers in ApJ Suppl seem to indicate a revised coordinate (259, 5) ecliptic for the Nose. Will this new value be incorporated onto the maps or will they stay at (255,5)?
Thanks!
Herb
Nathan Schwadron
n.schwadron at unh.edu
University of New Hampshire
Morse Hall - Room 354
8 College Road
Durham NH 03824
USA
(603) 862-3451
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