# Questions tagged [space]

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### Weight limited very high power transformers

I'm doing BOTN (back-of-the-napkin) math for electric rockets, specifically the weight of the transformers they would need. At least in principle, one can derive power from stellar winds, including ...
• 111
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### What are the limitations of USB in aerospace (especially microsatellites)?

I have just joined a startup company that builds microsatellites. But I am quite new to the aerospace field. I noticed that to connect components with the onboard computer we use many electrical ...
1 vote
339 views

### Why this grounding scheme?

The NASA technical book about grounding in spacecraft (NASA-HDBK-4001) (I believe the question may be relevant for any other terrestrial application) mentions this grounding scheme for subsystems: ...
• 1,403
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### Radial velocity of two moving targets [closed]

The radial velocity is the velocity which is in the direction of the connecting line. I would like to find the Doppler frequency of two moving targets, but as you know, this frequency only shows me ...
52 views

### How to choose a wrap (station) antenna for space application?

I am looking for my research project a wrap (station) antenna. It is assumed that the antenna works in space (lunar) environment. The total dose for my device is 30 – 50 krad. Gain 3-5 dBi. Frequency ...
90 views

### Why have space-grade components such long leads? [duplicate]

What are the reasons why (some) space-grade components are shaped like they are, with their characteristic long flat leads, golden finish, etc.? Image: DP83561-SP from TI Are the assembly houses ...
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### Loading a solar panel when PCB is without power

I need to be able to load some solar cells even when the PCB is without power. The basic set up is as follows: When the PCB is without power, the load on the solar cell should be R3 and the switch to ...
1 vote
357 views

### What are up-screened components?

What are up-screened components/devices in the frame of qualification of electronic components? How is it done?
1 vote
194 views

### Are nano/cube satellite electronics components special for space?

I was reading CubeSat 101 (https://www.nasa.gov/sites/default/files/atoms/files/nasa_csli_cubesat_101_508.pdf) wondering if the electronics components needed to be special for space but it says ...
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822 views

### Is there anyway to fit a breadboard into a 1.5 inch wide space?

I am working on a model rocket and want to add electrical parts to it via a breadboard inside. The space I have to work with is only about 40mm wide. Is there any kind of breadboard that can fit in ...
• 39
106 views

### What are the consequences of not having a magnetic field in the atmosphere on electronics?

Electronics super-noob here! (I did EE in school but have managed to forget practically everything since, to an alarming degree!). I'm wondering how the field of electrical engineering and electronics ...
59 views

### How does being exposed to strong radiations effect nanosatellite electronics equipment?

I'm on paper designing a nanosatellite power system. The satellite would be orbiting in LEO. And I am wondering how and what type of radiation would affect its electronics. The system has a ...
344 views

### Thermal resistance in vacuum

Is it possible to obtain an approximate guess of what the thermal resistance of a device (i.e. a power MOSFET) would be in a vacuum based on the ambient thermal resistance value provided in the ...
• 2,191
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### Adjustable DC/DC converter and/or LDOs for space application

I am currently designing a system for a satellite and I am looking into the components to generate the required low-voltages, and I was wondering if maybe the collective knowledge of stackexchange ...
• 49
642 views

### Current limiting solution for pocketqube satellite

A project I am working on requires a reliable current limiting solution for a pocketqube picosatellite. Currently a Texas TPS2553 is being employed which will cut power once the limit is hit. We are ...
• 1,098
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### Keil Error: L6406E: No space in execution regions - Using STM32F103RE

I have written a sample EMWIN Project in KEIL using its package manager, shown below. When I use the Build Project icon I get the following error: ...
• 459
226 views

### How to calculate the transmission distance from satellite to earth (How to understand the formula) [closed]

I have this question in one of my tutorials and I cannot seem to find clarity in the question - I am trying to make an algorithm to do this all automatically but I need to understand the formula I ...
• 21
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### Does a pickup microphone work in space (vacuum)?

Of course in space there is no sound transmitted via air, so there is no air-borne sound, but there is structure borne sound. This sound can be recorded with a pickup microphone, but do pickup ...
448 views

### How (or what is the best way) to raise and / or separate an LED from the PCB?

I'm designing a PCB where I have to locate two super flux LEDs like this one. The problem is that it has to be elevated, approximately, 8 mm from the PCB. What is the best way to do this? What type ...
• 496
266 views

### Reliability of electronic components in space [closed]

The Tesla car being recently shot into space made me wonder about the reliability of common electronic components in hard vacuum. I'm asking about the kind of components you would find in Musks's car-...
• 72k
162 views

### Are spacecraft electronic systems built in a modular way that allows astronauts to switch identical cards in case of damage?

In Mars episode 1, the astronauts find a damaged electronic card in a system. They decide to replace it by another card used by another system and that is supposedly identical to the damaged one. It ...
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1 vote
281 views

### Neutron Single Event Upset (NSEU) how its effect is mitigated in electronics in space vehicles?

Since in the outer space the NSEU will be more common than in the earth, how the electronics in space vehicle is tacking the issue. I feel a solution will be existing for some decades but on google I ...
• 462
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### Are chicken bits left in space-qualified ICs?

A chicken bit "is a bit on a chip that can be used by the designer to disable one of the features of the chip if it proves faulty or negatively impacts performance." Would space-qualified logic ...
1 vote
381 views

### Temperature Rating for Solar Panels

I am trying to decide on a power source for use in space, and as such they need to have a good operating temperature range. I can't find any decent source on the web about this particular topic for ...
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1 vote
84 views

### Solar Cell Performance With Varying Incident Angle

I am trying to calculate the power generated from solar panels placed on the Moon. I have an equation for power generated at the beginning and end of life and have hit a snag in my brain. If the solar ...
• 2,188
2k views

### What challenges restrict the resolution of spacefaring digital cameras?

I've been reading up about NASA's Juno mission, and came across the Wikipedia article about JunoCam, which is Juno's onboard visible-light camera. In the article, it's mentioned that the resolution ...
• 337
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### Key differences between solar-cells used for terrestrial and space applications

I'm looking for some of the key differences in materials for solar panels used in terrestrial vs. space-based applications. I have read the GaAs is common for space applications due to its relatively ...
• 1,018
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### Design Considerations for Electronics in Space [closed]

What additional constraints do we face when designing electronics/microsystems for use in orbit? What kinds of shielding techniques are employed? Is it common to enclose all electronics in a faraday ...
• 1,018
630 views

### Two-Ray Ground Propagation Model or Free Space Propagation Model

May I know that when we want to estimate outdoor transmission performance between two wireless points, which model,Two-Ray Ground Propagation Model or Free Space Propagation Model is more suitable? ...
• 11
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### Good Batteries for (way) Sub-Zero Temperatures

I am building a PongSat and I need some batteries that can withstand the temperatures found at very high altitudes. The pongsat is planned to go up to around 100 km altitudes where the temperature is ...
753 views

### Threaded alternative to MMCX connectors which mates to RG-316/U

I'm currently in the process of redesigning the RF section of a communications system for a cube satellite. There are two PCBs in this system: one containing the down/up converters and modem, and ...
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### What is the reason behind transfer function representation valid for only LTI system?

One of the major advantages of state space representation is the fact that it can represent non-LTI system as well. I tried searching a lot to find a reason but couldn't get a reason explicitly ...
• 41
579 views

### High-voltage capacitors in space

I'm currently designing an high voltage DC/DC converter, from a linear technology app-note. My goal is to bias an avalanche photodiode with 200 to 300V, on a small educational satellite. I picked the ...
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1 vote