Science Associate
Brookhaven National Laboratory

Sky's Edge


Debian Notes
Raspberry Pi Notes
ROS Notes

Justine Haupt

Running Debian, because if it's good enough for the International Space Station it's good enough for me.


I have a company
Open source technology from Sky's Edge

All publications to date
Research on instrumentation for cosmology, radio astronomy, and quantum instrumentation compiled at ResearhGate

Calibration Drone for Radio Astronomy
Fixed-wing drone carrying a calibration radio source for a 21cm radio telescope. We believe that 21cm intensity mapping is the future of dark energy cosmology and airborn beam mapping is a critical piece of the systematics-removal puzzle. 
more / about the PUMA telescope

Provisional Patent for Sensorless Condition Monitoring of Motors and Generators
I'm a proponent of open source and openly critical of the concept of patents, but when your dayjob is at a national lab, concessions are ocassionally made. Link to patent text forthcoming.  

Vera Rubin Observatory Test and Comissioning Cryostat
Cryostat/camera for operating 9-CCD modules of the Large Synoptic Survey Telescope's 189-CCD focal plane array. Several copies of this chamber are being produced,one of which will be installed on the telescope as the Commissionoing Camera. Uses closed loop cryogenic regrigeration systems servicing two thermal zones, one for cooling the CCD array and one for the readout electronics. CCD baseplate attaches to low thermal expansion kinematic support structure. more

LSST Accurate Star Simulator Optic (LASSO)
An f/1.2 lens that emulates the Vera Rubin Observatory telescope for the case of a single star. The optical design is catadiaptric: A Schwarzschild Objective modified with a meniscus lens at the output, which compensates the spherical aberration introduced by a flat window as on a vacuum chamber. In appears it's similar to a Maksutov Cassegrain but is really quite different (the small mirror silvered onto the meniscus lens is the primary mirror). paper, more

Atmospheric Turbulence Simulator
Optical system that simulates the perturbing effects of the atmosphere to create an image of a star with a realistic time-varying PSF. A common apparatus for adaptive optics developers, we use this to simulate putting a sensor "on the sky". Rotating phase screens with a surface structure consistent with the Kolmogorov turbulence frequency spectrum are our atmosphere. A Thorlabs wavefront sensor measures the real-time wavefront shape. The LASSO optic (above) provides the final imaging stage. more 

In-vacuum Actuated Radioisotope Carrier (X-ray Exposure Device)
A direct drive motor that carries an Iron-55 sample on the armature. Instead of conventional windings a PCB serves as both the stator and the mechanical baseplate making it intrinsically vacuum compatible. The PCB layout software I had access to at the time wasn't well suited to making curved traces on polar coordinates, so a mechanical CAD program (Autdesk Inventor) was used to design the stator PCB, which was as labor intensive as it sounds. more 

Vera Rubin Observatory Single-CCD Test Cryostat
CCD testing cryostat in the LSST production cleanroom. Stainless steel chamber with closed loop cooling, x-ray exposure capability, and a window cover on an articulated hinge. Docks to an optical testing station. more 

Optical tunnels for flat-field illumination

When supressing stray light there is such a thing as too many baffles. Baffle edges “glint” however thin they may be and without rigorous analysis one wonders if baffles are doing more harm than good.

In the case of an optical tunnel optimized for flat field illumination there should be as few exposed baffles as possible and I make the case that a single well placed primary baffle is optimally effective. more

Universal Lab Camera
An imaging system with interchangeable lensboard, front and back focus, and an optical target holder with lateral positioning. For imaging anything onto anything, ~90% 3D printed. more 

Focal Reducer
A focal reducer concept design proposal for a 3.5m telescope. more 

Coaxial piezo-actuated tip-tilt CCDs

A concept for actuating individual CCDs in tip/tilt/piston for integration into an active optics control loop. Dummy CCD is shown. more 

Metrological Test Stand for CCD Flatness Characterization
Differntial measurement system for in-cryostat 9-CCD flatness measurement. Uses two Keyence absolute-distance laser triangulation sensors to compare the surface height of the surface under test (CCD array imaging surface) to an optical reference flat. Concept: Peter Takacs. more 


Self-Driving Chevy Bolt

Endowing a Chevy Bolt with Self-Driving Capabilities Using an Openpilot-Derived System. 

Youtube Channel

Don't subscribe: 
Link to Youtube Channel

Brushless Motor Controller for Robotics

It's a two-channel controller for fine-positioning (arbtirarily low speed, bi-directional control) of brushless motors. It's open source, but it's also my second product through Sky's Edge. 

Portable Wireless Electronic Digital Rotary Telephone (AKA: Rotary Cellphone)

A truly usable rotary-dial cellphone to replace my flip phone (I don't use a smart phone). This is a statement against a world of touchscreens, hyperconnectivity, and complacency with big brother watchdogs. 

Unnatural Creatures in a Natural Setting

Radio Astronomy at Custer Observatory
Radio astronomy has been revived at Custer Obervatory in Southold NY. The name is the Southold Educational Radio Observatory (SERO) and the mission is twofold:
  • General access for people/students interested in radio astronomy and for personal projects.
  • Organized research in scientific niches. Low-budget open-source efforts have the freedom to explore many interesting scientific prospects that don't get funded in the professional space. 

Large Format 3D Printer

  • Fully enclosed and bigger than a refrigerator.
  • 24x24x30" build volume with single extruder toolhead.
  • 4X parallized printing with quad-toolhead
  • Duet control boards.
  • AC powered 5 zone heated build plate.
  • Smoke detection safety-shutdown system.
 Youtube Videomore

Thingiverse Designs

Drive System for Celestron CG-4 Telescope Mount

Originally used a PICAXE-based controller with the factory motor kit (more) to steer a heliostat for a spectroheliograph at the solar (not sidereal) rate.

Subsequently built a faster drive system with NEMA stepper motors and an Aruino-based controller for an tracking antenna base station for long range drone and balloon flights. Most recently used as a mount for a small radio telescope. more 

Printed Expandable Developement Drone

Homebrew multicopter drones seem to become ratsnests of tape, velcro, and cable ties as components are added and removed. This is a 3D printed airframe with an accessory cage / tower structure built onto the hub. The tower, comprised of four 3mm diameter carbon fiber tubes, carry 3D printed stages to which various electronics can be attached. The modular and extensible nature of the accessory tower allow complete freedom of reconfirgurability for tinkering and development. The original PED drone was lost somewhere in Southold, NY in 2013. A new and improved version is nearly complete which I'll put it on the Thingiverse some day. original blog post 

3D Printed Wood That Will Make People Think You're an Idiot

After sanding, Hatchbox Wood PLA is so wood-like that if you tell people it's 3D printed they wont believe you. more

Corrected Gregorian Telescope

A Gregorian with a sub-aperture corrector for diffraction limited imaging across a .5 degree field of view and 25mm fully illuminated field. Original optical design. This has become a long term back burner project. The OTA mechanical assembly is built but I still need to have the optics made. more 

Turn your unwanted 35mm camera into an accent/spot light for $10

Cut open a Jansjo LED light from IKEA and glue it to the film pressure plate on your old SLR instead of throwing it in the garbage. more

Note: I find the death of film tragic, both for still photography and at the theater.

Message in a bottle: If anyone has a retired 35mm movie projector (w/ platter system or not) they want taken off their hands please contact me.

Single-Dish Imaging Radio Telescope

CSoftware and hardware development to do radio imaging with a single dish. This is a work in progress that will become the basis for a larger (hopefully open source) effort at the Custer Institute's radio observatory (above). This incarnation uses a HackRFOne oftware defined radio, a 3D printed patch antenna feed, a ~1m spun aluminum dish (courtesy Tom Feireabend), and modified Celestron CG4 telescope mount (above): more


Eastern Long Island Old Time Jam at Hallockville Farm

Come play Old Time music at Hallockville Farm, the 2nd and 4th Thursdays of every month at 7pm.

Optical Harvest

Bremerton Astronomy Slam: Human Interactions at a Public Observatory 

Opinions here 


Custer Institute 
Director of Radio Astronomy

Brookhaven National Laboratory 
Science Associate

Sky's Edge 

Darmok and Jalad at Tanagra