Equinox Systems GEMINI Manuel d'utilisateur Page 68
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Noté. / 5. Basé sur avis des utilisateurs
Gemini Users Manual 63
5.3.9.3 Civil Time (Local Civil Time)
Expressed in 24 hour format, local "Civil Time" is converted to GMT (or UTC) by
adding or subtracting the time zone (Daylight Saving Time must be accounted for when
determining the time zone). For example, New York City in Eastern Standard Time is 5
time zones behind the time in Greenwich England (expressed as GMT or UTC).
Consequently, at 03:05 UTC (GMT) on May 5 -- the local time in Greenwich England,
the local time in New York City (at UTC-5) is 22:05 (10:05 P.M.), on May 4.
If Gemini's RTC is set with the Hand Controller, UTC must be entered. In contrast, when
you set Gemini's time from a PC using a planetarium program, local "Civil Time" must
be transmitted. The time zone must therefore be set before setting the time, so that the
UTC stored in the RTC is correctly calculated.
5.3.9.4 Local Sidereal (Local Sidereal Time)
"Local Sidereal" time (LST) at a given location is the right ascension (RA) of the local
meridian of the celestial sphere, and is related to the hour angle (HA) of the telescope's
RA setting by the equation HA=LST-RA. It is useful for positioning the telescope, and
for planning an observation sequence at or near the meridian. For example, suppose you
had a list of objects and wanted to observe the objects within 2 hours of the meridian. If
the LST were 13:24, you would look for objects with RA coordinates between 11h 24m
and 15h 24m.
5.3.10 Setup
• Hand Controller
• Mount Parameters
• Encoder
• Alarm/Buzzer
• UTC Date/Time
• Credit Info
• Restore Defaults
• Dim Display
• Geogr. Location
• Communication
Although "Setup" appears as the last menu item, you will often want to begin with it. All
parameters entered here are stored in Gemini's battery-backed-up memory (SRAM)
together with a checksum. If the checksum is wrong at the time of powering on, all
stored values return to their default settings, and a "CMOS reset" message is displayed on
the Hand Controller. "Setup" is used often, and contains the greatest number of
submenus; it is therefore highly recommended that you commit the "Setup" menu to
memory, and be thoroughly familiar with the submenus you most frequently use.
- Users Manual 1
- Table of Contents 2
- 1 Introduction 6
- 1.2 Features 7
- 1.3 What’s New in Level 4? 10
- 2 Getting Started 13
- 2.2 Installation 14
- 2.2.3 Encoders 15
- 2.2.4 Power Requirements 16
- 2.3.1 Controls 16
- 2.3.3 QuickMenu 18
- 2.4 Basics of Operation 19
- 2.4.1.2 Startup Position 20
- 2.4.2 Power On and Setup 20
- 2.4.2.2 Completing Startup 23
- 2.4.2.3 Preferences 23
- 2.4.4 Normal Operation 27
- 2.5 Next Steps 28
- 3.1.2 Precession 30
- 3.2 How the Sky Moves 31
- 3.3 Tracking 31
- 3.3.1.1 Predefined Rates 32
- Training Comet Tracking 35
- Timer Values 35
- PC Controlled Tracking 36
- 3.3.2 Meridian Flip 37
- 3.3.3 RA Safety Limits 37
- 3.4 Polar Alignment 39
- 3.4.3 Accuracy Required 41
- 3.5 Mount Modeling 42
- 3.5.3 Modeling Parameters 44
- 4.2 Guiding 45
- 4.2.2 Manual Guiding 46
- 4.2.5 Software Guiding 47
- 4.3.2 The PEC Submenu 49
- 4.3.2.1 Train PEC 49
- 4.3.2.2 Clear Data 50
- 4.3.2.3 Turn PEC On/Off 50
- 4.3.2.4 Delay Correction 50
- 4.3.2.5 Drift Correction 51
- 4.3.2.6 Smooth Data 52
- 4.3.2.7 Average Data 52
- 4.4 Other Functions 53
- 5.1 Startup Mode Menu 54
- 5.2 The Main Menu 55
- 5.3 Subordinate Menu System 56
- 5.3.1.2 {Reset Alignment} 57
- 5.3.1.3 {Additional Align} 57
- 5.3.1.4 Synchronize 58
- 5.3.1.5 {Polar Al. Assist} 58
- 5.3.1.6 {Polar Axis Corr.} 58
- 5.3.2 Object Database 59
- 5.3.2.1 Database Use 59
- 5.3.2.2 Accuracy and Epochs 60
- 5.3.2.3 Credits 60
- 5.3.2.6 IC (Index Catalog) 61
- 5.3.6.1 RA/DEC Display 64
- 5.3.6.2 Enter RA/DEC 64
- 5.3.6.3 Az/El Display 64
- 5.3.6.4 Enter Az/El 65
- 5.3.6.5 Set Bookmark 65
- 5.3.6.6 {GoTo Bookmark #n} 65
- 5.3.7 Identify 65
- 5.3.8 Object Search 66
- 5.3.8.2 Wobble Object 67
- 5.3.9 Show Date/Time 67
- 5.3.9.2 Julian Date 67
- 5.3.10 Setup 68
- 5.3.10.1 Hand Controller 69
- 5.3.10.2 Mount Parameters 69
- 5.3.10.2.1 Tracking Speed 70
- 5.3.10.2.2 Moving Speeds 71
- 5.3.10.2.5 Mount Type 72
- 5.3.10.2.8 {Pointing Model} 75
- 5.3.10.3 Encoder 76
- 5.3.10.4 Alarm/Buzzer 76
- 5.3.10.5 UTC Date/Time 77
- 5.3.10.6 Credit Info 77
- 5.3.10.7 Restore Defaults 78
- 5.3.10.8 Dim Display 78
- 5.3.10.9 Geogr. Location 78
- 5.3.10.9.5 Store Site 79
- 5.3.10.9.6 Load Site 79
- 5.3.10.10 Communication 80
- 5.3.10.10.2 Sync or Align 80
- 5.4 QuickMenu 81
- 5.4.1 Focusing 82
- 5.4.4 Centering 82
- 5.4.5 Park Mount! 83
- 5.4.6 Meridian Flip 83
- 5.4.7 Exit w/o Change 83
- 6 Serial Communication 85
- 6.2 Hand Controller port 87
- 6.3 Serial Command Sets 88
- 6.5.1 Telescope Driver 90
- 6.5.3 Coordinate Epoch 90
- 6.6 Using Control Programs 91
- 7 Troubleshooting 92
- 7.2 Debug Mode 96
- 8 Appendices 97
- QuickMenu 101
- Cold Start Setup Menu 101
- *Reduced Menu 101
- 8.2 Catalogs 102
- 8.3 Alignment Star List 103
- 8.4 Serial Line Protocol 105
- • Right Ascension 112
- • Declination {+ 112
- • the object name (up to 10 112
- Gemini Native Commands 116
- 8.5 Serial Communications 129
- 8.6 Autoguider Port 130
- 8.7 Encoder Port 132
- Connecting End Switches 133
- 8.8 Feature Port 134
- 8.9 Motor Connector Pinouts 135
- RJ-45 Connector 135
- DIN Connector 135
- 8.10 Power Connector Pinout 136
- Power Connector 136
- 8.11 Upgrading the EPROM 137
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