Diff for "NK2015_Oct10" - www.iram.es Main Wiki

Differences between revisions 7 and 10 (spanning 3 versions)

NIKA October 10th, 2015 / S1

Back to list of day to day logbook of observations

2015-10-10

Following not updated

.Cryostat Temperature: 170mK cooling down slowly

Arrays status tonight: full 2mm array - 1-3 Hz noise; 2 feed lines on 1mm array 3-5Hz noise

Modulation frequency: 10kHz 1mm, 5kHz 2mm

Opacity is measured with the new taumeter at 225 GHz

Nasmyth offsets : 0, 0

Set Focus : we start at -2mm (not at all optimised, first task is try to improve on this!)

Quick description of the session: Test the Pako sequences and data flows.

Data Repository: /home/nika2/NIKA/Data/run13_X/scan24_X

Scan	UT	Source	Command	Az	El	Pointing X, Y, Focus	Tau225	Comment
144-148	12h10m	Mars	FocusLissold	240	46	0,0,-2	0.7, increasing...	checking focus, centered at -2, steps 0.6
149-153	12h20m	Mars	FocusLissold	240	46	0,0,-0.8	0.7, increasing...	checking focus, centered at -0.8, steps 0.6
154	12h30m	Mars	OTFgeom	243	43	0,0,-0.8	0.7	we make a 'focus by hand' procedure, making at each step a small OTFgeom (NO lissajous!) so that then we can make maps pixel by pixel, less affected by the geometry (that we still do not know!)! first step: focus -0.8
155	12h38m	Mars	OTFgeom	245	42	0,0,-1.3: focus -1.3	0.7	'focus by hand' procedure, second step: focus -1.3
156	12h44m	Mars	OTFgeom	246	41	0,0,-0.3: focus -0.3	0.7	'focus by hand' procedure, third step: focus -0.3. It looks like we improve in this direction -> we try to go to positive focus...
157	12h52m	Mars	OTFgeom	248	39.5	0,0,-0.3: focus +0.2	0.7	'focus by hand' procedure, forth step: focus +0.2

-  ⇤ ← Revision 7 as of 2015-10-10 12:35:20 → 
  Size: 1545
  Editor: NikaBolometer
  Comment:
+   ← Revision 10 as of 2015-10-10 12:59:34 → ⇥
  Size: 2150
  Editor: NikaBolometer
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 27:
-||149-153   || 12h10m  ||  Mars    || FocusLissold      ||  240   ||  46    ||   0,0,-0.8             ||   0.7, increasing... :-(    || checking focus, centered at -0.8, steps 0.6  ||
|| 154   || 12h10m  ||  Mars    || OTFgeom      ||  243   ||  43    ||   0,0,-0.8             ||   0.7   || we make a 'focus by hand' procedure, making at each step a small OTFgeom (NO lissajous!) so that then we can make maps pixel by pixel, less affected by the geometry (that we still do not know!)! first step: focus -0.8  ||
+||149-153   || 12h20m  ||  Mars    || FocusLissold      ||  240   ||  46    ||   0,0,-0.8             ||   0.7, increasing... :-(    || checking focus, centered at -0.8, steps 0.6  ||
|| 154   || 12h30m  ||  Mars    || OTFgeom      ||  243   ||  43    ||   0,0,-0.8             ||   0.7   || we make a 'focus by hand' procedure, making at each step a small OTFgeom (NO lissajous!) so that then we can make maps pixel by pixel, less affected by the geometry (that we still do not know!)! first step: focus -0.8  ||
|| 155   || 12h38m  ||  Mars    || OTFgeom      ||  245   ||  42    ||   0,0,-1.3: focus -1.3            ||   0.7   || 'focus by hand' procedure, second step: focus -1.3  ||
|| 156   || 12h44m  ||  Mars    || OTFgeom      ||  246   ||  41    ||   0,0,-0.3: focus -0.3            ||   0.7   || 'focus by hand' procedure, third step: focus -0.3. It looks like we improve in this direction -> we try to go to positive focus... ||
|| 157   || 12h52m  ||  Mars    || OTFgeom      ||  248   ||  39.5    ||   0,0,-0.3: focus +0.2            ||   0.7   || 'focus by hand' procedure, forth step: focus +0.2  ||