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Questions tagged [space]

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6
votes
2answers
178 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 ...
0
votes
1answer
116 views

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: ...
-6
votes
1answer
60 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 ...
8
votes
3answers
1k views

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 ...
0
votes
2answers
107 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 ...
2
votes
2answers
197 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-...
0
votes
0answers
88 views

lcd showing characters instead of blank space?

I have seen this type of error in my codes, in some of this situation like reaching to near about 90%, -99 % of an eeprom memory of avr microcontroler in Mikrobasic PRO For AVR of Microelctronica LTD, ...
2
votes
2answers
152 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 ...
1
vote
2answers
155 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 ...
12
votes
2answers
3k views

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
2answers
288 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 ...
1
vote
0answers
72 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 ...
18
votes
5answers
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 ...
4
votes
1answer
739 views

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 ...
8
votes
2answers
1k views

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 ...
0
votes
1answer
565 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? ...
3
votes
2answers
854 views

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 ...
5
votes
2answers
502 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 ...
0
votes
4answers
3k views

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 ...
3
votes
2answers
427 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 ...
0
votes
3answers
161 views

Communicating with the moon via capacitance

In the question Capacitance between Earth and Moon, several answers gave a value for the capacitance between the earth and the moon at tens or hundreds of µF. Since capacitors are conductive to AC, ...