રેડિયો frequency based deep જગ્યા communication faces constraints due to low bandwidth and increasing need of high data transmission rates. Laser or optical based system has potential to break the communication constraints. નાસા has tested laser communications against extreme distances and demonstrated high-bandwidth communications in deep જગ્યા when it beamed to Earth an ultra-high-definition video via laser from a distance of 32 million km, from Psyche spacecraft which is currently travelling through deep જગ્યા to metal-rich asteroid Psyche located in the asteroid belt between માર્ચ and Jupiter. This was first demonstration of optical communications beyond the Moon. Deep જગ્યા Network (DSN) antenna received both રેડિયો frequency and near-infrared laser signals.
ડીપ જગ્યા communication is mostly conducted using radio frequencies. However, radio frequency-based system cannot meet current and future communication needs of જગ્યા sector in view of limited bandwidth and ever-increasing demand of high data transmission rates.
On the other hand, laser or optical based communication offer many advantages in terms of large bandwidths, high data rate links and low SWaP (size, weight and power) terminals. It has the potential to enhance data rates 10 to 100 times the capacity of most sophisticated radio systems currently in use thus can break the communication constraints. Hence, the imperative to advance optical communications for high-capacity deep જગ્યા communications capable of meeting future interplanetary data transmission needs.
ડીપ જગ્યા Optical Communications (DSOC) experiment is a technology demonstration payload onboard Psyche spacecraft which is currently travelling through deep જગ્યા to metal-rich એસ્ટરોઇડ વચ્ચે એસ્ટરોઇડ પટ્ટામાં સ્થિત માનસ માર્ચ and Jupiter. In December 2023, it demonstrated high-bandwidth communications in deep જગ્યા when it beamed to Earth an ultra-high-definition video via laser from 32 million km in deep space. This was first demonstration of optical communications beyond the Moon.
ડીપ જગ્યા Network (DSN) is network of facilities located in different parts of the world to communicate with faraway spacecrafts exploring solar system. An experimental antenna of this network received both radio and laser signals beamed from Psyche spacecraft in deep space. This suggests that DSN antennas which currently communicate with spacecrafts via radio signals could be retrofitted for laser communications.
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સંદર્ભ:
- કાર્મોસ એસ., એટ અલ 2022. ઓપ્ટિકલ કોમ્યુનિકેશન્સ ડીપ સ્પેસ કોમ્યુનિકેશન્સના ભવિષ્યને કેવી રીતે આકાર આપી શકે છે? સર્વેક્ષણ. પ્રીપ્રિન્ટ arXiv. DOI: https://doi.org/10.48550/arXiv.2212.04933
- રોબિન્સન BS, 2023. અવકાશ સંશોધન અને વિજ્ઞાન માટે ઓપ્ટિકલ કોમ્યુનિકેશન્સ. ઓપ્ટિકલ ફાઈબર કોમ્યુનિકેશન્સ કોન્ફરન્સ 2023.
- નાસાનો ટેક ડેમો લેસર દ્વારા ડીપ સ્પેસમાંથી પ્રથમ વિડિયો સ્ટ્રીમ કરે છે. 18 ડિસેમ્બર 2023 ના રોજ પોસ્ટ કરવામાં આવ્યું. પર ઉપલબ્ધ https://www.nasa.gov/directorates/stmd/tech-demo-missions-program/deep-space-optical-communications-dsoc/nasas-tech-demo-streams-first-video-from-deep-space-via-laser/
- નાસા. સમાચાર – નાસાનું નવું પ્રાયોગિક એન્ટેના ડીપ સ્પેસ લેસરને ટ્રેક કરે છે. 08 ફેબ્રુઆરી 2024 ના રોજ પોસ્ટ કરવામાં આવ્યું. અહીં ઉપલબ્ધ છે https://www.nasa.gov/technology/space-comms/deep-space-network/nasas-new-experimental-antenna-tracks-deep-space-laser/
- ડીપ સ્પેસ ઓપ્ટિકલ કોમ્યુનિકેશન્સ (DSOC) https://www.nasa.gov/mission/deep-space-optical-communications-dsoc/
- મિશન સાયકી. https://science.nasa.gov/mission/psyche/
- નાસાનું ડીપ સ્પેસ નેટવર્ક (DSN) https://www.jpl.nasa.gov/missions/dsn
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