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 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.8 - 06 Feb 2008 - DavidRose)
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The Penn Array is also known as the Mustang receiver.

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N2 299.65 4_6 (3.95-5.85 GHz) C
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N2 299.65 4_6 (3.95-5.85 GHz) C / Penn Array (when installed)
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N6 139.64 18_26 (18-26.5 GHz) K / Penn Array (when installed)
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N6 139.64 18_26 (18-26.5 GHz) K
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N8 59.66 12_18 (12-15.4 GHz) / ZSpectrometer Ku
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N8 59.66 12_18 (12-15.4 GHz) / Zpectrometer Ku / Zpect (when installed)
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-- DavidRose - 28 Mar 2007

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-- DavidRose - 6 Feb 2008


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.7 - 28 Mar 2007 - DavidRose)
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N2 299.65 na PAR (Penn Array)
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N2 299.65 4_6 (3.95-5.85 GHz) C
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N6 139.64 18_26 (18-26.5 GHz) K
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N6 139.64 18_26 (18-26.5 GHz) K / Penn Array (when installed)
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Prime Focus 1 Q-Band Penn Array S-Band K-Band Ku-Band
Prime Focus 2 none C-Band (when installed) X-Band L-Band Ka-Band (when installed)
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Prime Focus 1 Q-Band Penn Array (when installed S-Band K-Band Ku-Band
Prime Focus 2 none C-Band X-Band Ka-Band L-Band
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-- DavidRose - 14 Oct 2006

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-- DavidRose - 28 Mar 2007


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.6 - 19 Oct 2006 - DavidRose)
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N2 299.65 4_6 (3.95-5.85 GHz) C
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N2 299.65 na PAR (Penn Array)
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-- DavidRose - 4 Oct 2006

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-- DavidRose - 14 Oct 2006


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.5 - 04 Oct 2006 - DavidRose)
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Turret Position Turret Angle (Deg.) Receiver Receiver band
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Turret Position Turret Angle (Deg.) Receiver or Instrument Receiver band
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N4 219.66 12_18 (12-15.4 GHz) Ku
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N4 219.66 8_10 (8-10.1 GHz) X
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N8 59.66 8_10 (8-10.1 GHz) X
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N8 59.66 12_18 (12-15.4 GHz) / ZSpectrometer Ku
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Prime Focus Q-Band Penn Array S-Band K-Band Ku-Band
none none none X-Band L-Band none
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Prime Focus 1 Q-Band Penn Array S-Band K-Band Ku-Band
Prime Focus 2 none C-Band (when installed) X-Band L-Band Ka-Band (when installed)
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-- DavidRose - 18 Aug 2005

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-- DavidRose - 4 Oct 2006


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.4 - 18 Aug 2005 - DavidRose)
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Prime Focus Q-Band L-Band S-Band K-Band Spare
none none C-Band X-Band Ku-Band none
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Prime Focus Q-Band Penn Array S-Band K-Band Ku-Band
none none none X-Band L-Band none
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-- DavidRose - 9 Feb 2005

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-- DavidRose - 18 Aug 2005


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.3 - 09 Feb 2005 - DavidRose)
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Information sources include Comsat/LM documentation, GBT Memos, and information from Green Bank staff personnel.

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Information sources include Comsat/LM documentation, GBT Memos, and information from Green Bank staff personnel.

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Electronics

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Electronics

    Receiver Turret Locations 

GBT Gregorian Receiver Locations on the Turret
Turret Position Turret Angle (Deg.) Receiver Receiver Band
N1 359.68 1_2  (1.15-1.73 GHz) L
N5 179.65 2_3  (1.73-2.60 GHz) S
N2 299.65 4_6  (3.95-5.85 GHz) C
N8 59.66 8_10  (8-10.1 GHz) X
N4 219.66 12_18  (12-15.4 GHz) Ku
N6 139.64 18_26  (18-26.5 GHz) K
N3 259.65 40_50  (40.0-50.0GHz) Q
N7 99.648 Holography n/a

    Receiver Circular Polarization Optimization 

        S-Band
Sky Frequency (MHz) Gain X Setting Gain Y Setting
< 1900 0 +2.5
1953 0 +2.0
2006 0 +1.0
2165 0 ±0.0
2218 0 -1.0
2324 0 -3.0
2370 0 -4.74
2380 0 -5.11
2430 0 -7.0
> 2483  +3.0 -2.0
        L-Band
Sky Frequency (MHz) Low Cal High Cal Gain X Setting Gain Y Setting Phase
1300 2.1 28.0 4.6 ±0.0 56.0
1400 2.1 28.2 4.6 ±0.0 52.0
1500 2.1 28.2 4.6 ±0.0 50.0
1600 2.2 31.4 4.6 ±0.0 46.0

Cryogenics     

    Compressors Supplying Receivers

Compressor #1  Compressor #2 Compressor #3  Compressor #4  Compressor #5 Compressor #6 
Prime Focus Q-Band L-Band S-Band K-Band Spare
none none C-Band X-Band Ku-Band none

Telescope Limits     

    Azimuth Limits (CW) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
90.200 90.674 91.220 91.628 92.200 450

    Azimuth Limits (CCW) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
270.200 269.729 269.200 268.564 268.200 -90

     Elevation Limits (Up) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
95.100 95.355 95.593 95.854 96.084

    Elevation Limits (Down) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
4.900 4.663 4.411 4.155 3.919

    Subreflector Actuator Software Limits 

Actuator Retracted Limit (inches) Extended Limit (inches)
Y1 98.64 135.69
Y2 97.88 136.57
Y3 97.88 136.57
X1 114.24 144.85
X2 114.24 144.85
X3 56.70 76.11

Telescope Movement Rates     

    Azimuth - Elevation 

Azimuth (Full Slew) Elevation (Full Slew)
Degrees/Min Arc Minutes/Min Degrees/Min Arc Minutes/Min
36 2160 18 1080

    Degree/Min to Arc Minutes/Min Conversion Table 

Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min
1 60 11 660 21 1260 31 1860
2 120 12 720 22 1320 32 1920
3 180 13 780 23 1380 33 1980
4 240 14 840 24 1440 34 2040
5 300 15 900 25 1500 35 2100
6 360 16 960 26 1560 36 2160
7 420 17 1020 27 1620 37 2220
8 480 18 1080 28 1680 38 2280
9 540 19 1140 29 1740 39 2340
10 600 20 1200 30 1800 40 2400

Conversion Formulae

Degrees Per Minute to Arc Minutes Per Minute:   Deg/Min   x   60 Arc Min/Deg'  =  Arc Min/Min

Arc Minutes Per Minute to Degrees Per Minute:  Arc Min/Min   ÷   60   =   Degrees Per Minute  

Unusual Observing Operations

    Pointing Coefficients 

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Receiver Turret Locations

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Prime Focus Pointing Coefficients - Focus Tracking Off (Arcmins)
Azimuth Positions Values Elevation Positions Values
D00 -.9778 D00 3.13
B01 1.0878 C10 -.0495
D01 -1.3523 D10 .0617
B11 .0495 B01 6.9
A11 .0617 D01 -10.0
C21 .0000    
D21 .0000    
Assumes axial focus (Y = 1030mm or 40.55 in.) and lateral focus (X = 560mm or 22.05 in.)
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GBT Gregorian Receiver Locations on the Turret
Turret Position Turret Angle (Deg.) Receiver Receiver band
N1 359.68 1_2 (1.15-1.73 GHz) L
N2 299.65 4_6 (3.95-5.85 GHz) C
N3 259.65 40_50 (40.0-50.0GHz) Q
N4 219.66 12_18 (12-15.4 GHz) Ku
N5 179.65 2_3 (1.73-2.60 GHz) S
N6 139.64 18_26 (18-26.5 GHz) K
N7 99.648 26_40 (26.0-40.0 GHz) Ka
N8 59.66 8_10 (8-10.1 GHz) X

Receiver Circular Polarization Optimization

S-Band
Sky Frequency (MHz) Gain X Setting Gain Y Setting
< 1900 0 +2.5
1953 0 +2.0
2006 0 +1.0
2165 0 ±0.0
2218 0 -1.0
2324 0 -3.0
2370 0 -4.74
2380 0 -5.11
2430 0 -7.0
> 2483 +3.0 -2.0

L-Band
Sky Frequency (MHz) Low Cal High Cal Gain X Setting Gain Y Setting Phase
1300 2.1 28.0 4.6 ±0.0 56.0
1400 2.1 28.2 4.6 ±0.0 52.0
1500 2.1 28.2 4.6 ±0.0 50.0
1600 2.2 31.4 4.6 ±0.0 46.0

Cryogenics

Compressors Supplying Receivers
Compressor #1 Compressor #2 Compressor #3 Compressor #4 Compressor #5 Compressor #6
Prime Focus Q-Band L-Band S-Band K-Band Spare
none none C-Band X-Band Ku-Band none

Telescope Limits

Azimuth Limits (CW) Deg.
Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
90.200 90.674 91.220 91.628 92.200 450

Azimuth Limits (CCW) Deg.
Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
270.200 269.729 269.200 268.564 268.200 -90

Elevation Limits (Up) Deg.
Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
95.100 95.355 95.593 95.854 96.084

Elevation Limits (Down) Deg.
Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
4.900 4.663 4.411 4.155 3.919

Subreflector Actuator Software Limits
Actuator Retracted Limit (inches) Extended Limit (inches)
Y1 98.64 135.69
Y2 97.88 136.57
Y3 97.88 136.57
X1 114.24 144.85
X2 114.24 144.85
Z1 56.70 76.11

Telescope Movement Rates (Azimuth - Elevation)

Azimuth (Full Slew) Elevation (Full Slew)
Degrees/Min Arc Minutes/Min Degrees/Min Arc Minutes/Min
36 2160 18 1072

Degree/Min to Arc Minutes/Min Conversion Table
Deg/Min Arc Min/Min   Deg/Min Arc Min/Min   Deg/Min Arc Min/Min   Deg/Min Arc Min/Min
1 60   11 660   21 1260   31 1860
2 120   12 720   22 1320   32 1920
3 180   13 780   23 1380   33 1980
4 240   14 840   24 1440   34 2040
5 300   15 900   25 1500   35 2100
6 360   16 960   26 1560   36 2160
7 420   17 1020   27 1620   37 2220
8 480   18 1080   28 1680   38 2280
9 540   19 1140   29 1740   39 2340
10 600   20 1200   30 1800   40 2400

Conversion Formulae

Degrees Per Minute to Arc Minutes Per Minute: Deg/Min x 60 Arc Min/Deg' = Arc Min/Min

Arc Minutes Per Minute to Degrees Per Minute: Arc Min/Min ÷ 60 = Degrees Per Minute

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Unusual Observing Operations

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Prime Focus Pointing Coefficients - Focus Tracking Off (Arcmins) Assumes axial focus (Y = 900mm) and lateral focus (X = 500mm)

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-- DavidRose - 1 Apr 2004

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-- DavidRose - 9 Feb 2005


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.2 - 01 Apr 2004 - DavidRose)
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L
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L
N5 179.65 2_3  (1.73-2.60 GHz) S
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C
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C
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N3 259.65 Vacant n/a
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N8 59.66 8_10  (8-10.1 GHz) X
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Ku
N5 179.65 2_3  (1.73-2.60 GHz) S
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Ku
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K
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K
N3 259.65 40_50  (40.0-50.0GHz) Q
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Holography
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Holography
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N8 59.66 8_10  (8-10.1 GHz) X
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-- DavidRose - 31 Mar 2004

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-- DavidRose - 1 Apr 2004


 <<O>>  Difference Topic Digital-Electro-MechanicalReferenceInformation (r1.1 - 31 Mar 2004 - DavidRose)
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%META:TOPICINFO{author="DavidRose" date="1080746940" format="1.0" version="1.1"}% %META:TOPICPARENT{name="TelescopeOperations"}%

TELESCOPE OPERATIONS

DIGITAL-ELECTRO-MECHANICAL REFERENCE INFORMATION

Info

Information sources include Comsat/LM documentation, GBT Memos, and information from Green Bank staff personnel.

Electronics

    Receiver Turret Locations 

GBT Gregorian Receiver Locations on the Turret
Turret Position Turret Angle (Deg.) Receiver Receiver Band
N1 359.68 1_2  (1.15-1.73 GHz) L
N2 299.65 4_6  (3.95-5.85 GHz) C
N3 259.65 Vacant n/a
N4 219.66 12_18  (12-15.4 GHz) Ku
N5 179.65 2_3  (1.73-2.60 GHz) S
N6 139.64 18_26  (18-26.5 GHz) K
N7 99.648 Holography n/a
N8 59.66 8_10  (8-10.1 GHz) X

    Receiver Circular Polarization Optimization 

        S-Band
Sky Frequency (MHz) Gain X Setting Gain Y Setting
< 1900 0 +2.5
1953 0 +2.0
2006 0 +1.0
2165 0 ±0.0
2218 0 -1.0
2324 0 -3.0
2370 0 -4.74
2380 0 -5.11
2430 0 -7.0
> 2483  +3.0 -2.0
        L-Band
Sky Frequency (MHz) Low Cal High Cal Gain X Setting Gain Y Setting Phase
1300 2.1 28.0 4.6 ±0.0 56.0
1400 2.1 28.2 4.6 ±0.0 52.0
1500 2.1 28.2 4.6 ±0.0 50.0
1600 2.2 31.4 4.6 ±0.0 46.0

Cryogenics     

    Compressors Supplying Receivers

Compressor #1  Compressor #2 Compressor #3  Compressor #4  Compressor #5 Compressor #6 
Prime Focus Q-Band L-Band S-Band K-Band Spare
none none C-Band X-Band Ku-Band none

Telescope Limits     

    Azimuth Limits (CW) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
90.200 90.674 91.220 91.628 92.200 450

    Azimuth Limits (CCW) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit Cleo Indicated Position
270.200 269.729 269.200 268.564 268.200 -90

     Elevation Limits (Up) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
95.100 95.355 95.593 95.854 96.084

    Elevation Limits (Down) Deg.

Software Pre Limit Redundant Pre Limit Final Limit Redundant Final Limit
4.900 4.663 4.411 4.155 3.919

    Subreflector Actuator Software Limits 

Actuator Retracted Limit (inches) Extended Limit (inches)
Y1 98.64 135.69
Y2 97.88 136.57
Y3 97.88 136.57
X1 114.24 144.85
X2 114.24 144.85
X3 56.70 76.11

Telescope Movement Rates     

    Azimuth - Elevation 

Azimuth (Full Slew) Elevation (Full Slew)
Degrees/Min Arc Minutes/Min Degrees/Min Arc Minutes/Min
36 2160 18 1080

    Degree/Min to Arc Minutes/Min Conversion Table 

Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min   Deg/Min = Arc Min/Min
1 60 11 660 21 1260 31 1860
2 120 12 720 22 1320 32 1920
3 180 13 780 23 1380 33 1980
4 240 14 840 24 1440 34 2040
5 300 15 900 25 1500 35 2100
6 360 16 960 26 1560 36 2160
7 420 17 1020 27 1620 37 2220
8 480 18 1080 28 1680 38 2280
9 540 19 1140 29 1740 39 2340
10 600 20 1200 30 1800 40 2400

Conversion Formulae

Degrees Per Minute to Arc Minutes Per Minute:   Deg/Min   x   60 Arc Min/Deg'  =  Arc Min/Min

Arc Minutes Per Minute to Degrees Per Minute:  Arc Min/Min   ÷   60   =   Degrees Per Minute  

Unusual Observing Operations

    Pointing Coefficients 

Prime Focus Pointing Coefficients - Focus Tracking Off (Arcmins)
Azimuth Positions Values Elevation Positions Values
D00 -.9778 D00 3.13
B01 1.0878 C10 -.0495
D01 -1.3523 D10 .0617
B11 .0495 B01 6.9
A11 .0617 D01 -10.0
C21 .0000    
D21 .0000    
Assumes axial focus (Y = 1030mm or 40.55 in.) and lateral focus (X = 560mm or 22.05 in.)

 

-- DavidRose - 31 Mar 2004


Topic Digital-Electro-MechanicalReferenceInformation . { View | Diffs | r1.8 | > | r1.7 | > | r1.6 | More }
Revision r1.1 - 31 Mar 2004 - 15:29 GMT - DavidRose
Revision r1.8 - 06 Feb 2008 - 20:55 GMT - DavidRose 		Content copyright © 1999-2007 by the contributing authors.
All material on this collaboration platform is the property of the contributing authors.