artillery hasty astro

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ARTILLERY HASTY ASTRO
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What is artillery hasty astro and what does it do
for me?

• Artillery astro is a process of computing a
  grid azimuth and a check angle from observations
  of the sun or a selected survey star
• It is accomplished using the M2A2 aiming
  circle, Precision Lightweight GPS Receiver
  (PLGR), a Backup Computer System (BUCS-R) and DA
  Form 7286-R
• Your end result is position (easting, northing
  and altitude) and a grid azimuth from the near
  stake to a far stake established by the astro

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The M2A2 Aiming Circle

• In general, this instrument has
•  
• a. The ability to provide survey control to
  supported units in the absence of existing
  control. This enhances the capabilities of the
  units being supported
•  
• b. However, control established by hasty methods
  is generally not common to other survey control
  on the battlefield, and is considered to be of a
  very reduced accuracy. The accuracy of hasty
  survey is considered to be only 1 part in 500
  (1/500) at best. For this reason, a hasty survey
  must always be converted to common control at the
  earliest available time

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Hasty Astro

• Considerations
•  
• Accurate time is critical when using the Hasty
  Astro method. Time is required to within 1
  second of Greenwich Mean Time (GMT also known
  as Zulu time) and can be obtained from an atomic
  clock, time cube or GPS
• The PLGR must be in the averaging mode and
  collect 200 consecutive hits with a Figure of
  Merit (FOM) of 1 for an accurate location
• Ensure proper aiming circle setup and level

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Hasty Astro
(Computations are performed using the BUCS-R, and
program 6)

• Procedure
•  
• Setup the aiming circle over the near stake
• Set 0.0 mils on the upper scales (recording
  motion ) of the aiming circle
• 3. Open the orienting knob covers
  (non-recording motion)
• 4. If tracking the sun, put the sun filter on
  the end of the elbow telescope
• 5. Track the celestial body using the
  non-recording motion

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Hasty Astro

• Procedure
•  
• Announce TRACKING to signify proper orientation
  on the sun
• At the announcement of TIP, record the time and
  date of the observation to the nearest second on
  DA Form 7286-R
• Drop the elevation sight to a point (100 meters
  minimum, 200 meters optimum) out from the aiming
  circle on the ground
• Another Marine will run the far stake out to this
  point and the IO will align the stake perfectly
  to the aiming circles reticle crosshairs

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Hasty Astro

• Procedure
•  
• The far stake is then driven into the deck
• The instrument operator (IO) will then close the
  orienting knob covers and begin tracking the
  celestial body a second time with the recording
  motion (Upper motion)
• The second track is to establish a check angle
  which will be compared to the BUCS output
• The IO will track the celestial body from the
  same orientation as the first reading - leading,
  center or trailing edge

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Computations for Hasty Astro

• Announce TRACKING to signify proper orientation
  on the sun
• Announce TIP when the center of the reticule is
  exactly aligned on the sun or star for the second
  time
• At the announcement of TIP, record the time and
  date of the observation to the nearest second on
  DA Form 7286-R
• The BUCS-R is then oriented to survey menu 6
• Station information, ellipsoid, grid zone, time
  zone, and star are entered into the BUCS-R.
  From DA Form 7286-R, input date, time, and
  observation orientation

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Computations for Hasty Astro

• A grid azimuth is displayed for the first TIP
  which is the azimuth to the far stake
• When you complete the second reading, a check
  angle is mathematically produced by the BUCS-R.
  This check angle must agree with the angle on the
  azimuth micrometer scale within 2 mils. If it
  does not, you must repeat the entire process
  until it does
• If the check angle is good, you have established
  position and direction for your radar site

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OS BOONDOCKS
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555000
3838000
N
14
0
U
Y or N
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BUCS-R
Nothing more than a palmtop computer with a
survey program loaded on it
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• The background is changed by pressing / and
  then the ON key
• Zoom in or out by pressing Fn and the space
  bar
• Select option 6 for Hasty Astro

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• Enter station data from DA Form 7286-R
• When complete, press enter and your data will
  be displayed again. Press F5 to proceed to the
  next screen

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• Enter observation data from DA Form 7286-R in
  the format shown
• When complete, press enter to obtain grid
  azimuth from near to far stake and check angle

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• Record azimuth and check angle on DA Form
  7286-R.
• Remember, if your angle does not match the
  check angle within 2 mils, it is wrong and must
  be done again

• If it bumps, you have established location and
  direction. Pack the gear and bring the team in

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QUESTIONS