PDS_VERSION_ID                    = PDS3
RECORD_TYPE                       = STREAM
LABEL_REVISION_NOTE               = "2010-11-11, CMA, Creation;
2013-01-04, BG,  Corrections;
2016-10-27, BG,  Revision"

OBJECT                            = INSTRUMENT
  INSTRUMENT_HOST_ID              = "RO"
  INSTRUMENT_ID                   = "NAVCAM"

  OBJECT                          = INSTRUMENT_INFORMATION
    INSTRUMENT_NAME               = "NAVIGATION CAMERA"
    INSTRUMENT_TYPE               = "CCD CAMERA"
    INSTRUMENT_DESC               = "

======================================================================
Instrument Overview:
======================================================================
 
The Navigation Camera (NavCam) is a part of the ROSETTA Attitude and
Orbit Control System (AOCS). For redundancy there are two identical
cameras.
The main purpose of the NavCam system is to provide imaging data for
optical navigation of the spacecraft with respect to the comet and
asteroids.
In asteroid tracking mode the information provided by the NavCam can
also be used autonomously for attitude control in a closed loop.
 
======================================================================
Objectives of the NavCam:
======================================================================
 
- Imaging of Star-fields and Extended Sources
- Autonomous Acquisition and Tracking of Extended Sources
- Autonomous Acquisition and Tracking of Point Targets
 
======================================================================
The ROSETTA NavCam Instrument:
======================================================================
 
The instrument consists of three main components:
 
+ Camera Optical Head (CAM-OH)
   The Camera Optical Head contains the optical system, the CCD
   detector and the electronics required to operate the CCD.
   It also supports the dust cover and attenuation mechanism in
   front of the optics.
 
+ Camera Electronics Unit (CAM-OH)
   The Camera Electronic Unit contains the digital electronics and
   interfaces for data transfer with the Avionics Interface Unit (AIU)
   and the Solid State Mass Memory (SSMM).
 
+ Camera Baffle (CAM-BAF)
   The Camera Baffle reduces stray light entering the optical system.
 
======================================================================
NavCam Characteristics:
======================================================================
 
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 |     Parameter        |    Value    |           Comment            |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Mass CAM-OH          |   6.05 kg   | Camera Optical Head          |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Mass CAM-EU          |   2.70 kg   | Camera Electronic Unit       |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Mass CAM-BAF         |  1.408 kg   | Camera Baffle                |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Total Mass           |  10.158 kg  |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Total Power          |   16.8 W    |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Field of View        | 5deg x 5deg |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Sensor Type          |     CCD     | CCD47-20 by e2v              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Number of Pixels     | 1024 x 1024 |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Dynamic Range        |  12 bits    | Saturation at DN 4095        |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Focal Length         |  152.5 mm   | Effective Focal Length       |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Pixel Size           |  13 microm. |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Pixel Angular Size   | 17.6 arcsec |                              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Aperture             |  70 mm      | Non-Attenuated Modes         |
 |                      |  30 mm      | Attenuated Mode              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | F/Number             |  f/2.2      | Non-Attenuated Modes         |
 |                      |  f/5.1      | Attenuated Mode              |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Limit Magnitude      |   Mv = 11   | Exp. time 5 s, SNR >= 5      |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Saturation Magnitude |  Mv = 1.6   | Whole spectral range,        |
 |                      |  Mv = 0.8   | G2 Class., exp. time = 10 ms |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Integration Time     |    10 ms    | Minimum                      |
 |                      |    30 s     | Maximum                      |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Bias Error (1 sigma) |  0.2 pixel  | Mv = 11, exp. time = 5 s,    |
 |                      |             | Defocused mode               |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | NEA (1 sigma)        |  0.1 pixel  | Mv = 11, exp. time = 5 s,    |
 |                      |             | Defocused mode               |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | Commandable          |   20 x 20   | Minimum pixel array          |
 | Window Size          | 1024 x 1024 | Maximum pixel array          |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | CCD Operative        | -50 deg C   | Minimum                      |
 | Temperature Range    | +50 deg C   | Maximum                      |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 | CCD Performance      | -25 deg C   | Minimum                      |
 | Temperature Range    |   0 deg C   | Maximum                      |
 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
======================================================================
History of the Instrument:
======================================================================
 
The NavCam for the Rosetta mission was designed by Galileo Avionica,
building on a heritage of existing models, to satisfy the requirements
of the Rosetta Autonomous Navigation Component.
 
======================================================================
NavCam Location on the Spacecraft:
======================================================================
 
Optics:       The NavCam optical heads are located on the +Z side
              protruding from the main body of the spacecraft.
 
Electronics:  The Electronic Units for the NavCams are located in the
              Avionics power box, common for all AOCMS components.
 
======================================================================
Operational Modes:
======================================================================
 
The NavCam has seven main operational modes. However, imaging data
are only acquired under the IMAGING and ASTEROID TRACKING modes.
 
======================================================================
Calibration:
======================================================================
 
This section is to be added once the calibration pipeline has been
set up."

  END_OBJECT                      = INSTRUMENT_INFORMATION

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    REFERENCE_KEY_ID              = "N/A"
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END_OBJECT                        = INSTRUMENT
END