Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Jack K. Kreng"'
Autor:
Gleason Q. Chen, Jack K. Kreng
During the entire launch sequences from liftoff to final orbital insertion of a space vehicle (SV), adequate link requirements are to be maintained for telemetry, tracking, and command (TT&C) for uplink and downlink services, from launch vehicle (LV)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4670912619596a66f17d0df1705f6651
http://www.intechopen.com/articles/show/title/dynamic-link-from-liftoff-to-final-orbital-insertion-for-a-meo-space-vehicle
http://www.intechopen.com/articles/show/title/dynamic-link-from-liftoff-to-final-orbital-insertion-for-a-meo-space-vehicle
Publikováno v:
2019 IEEE Aerospace Conference.
The study is to perform dynamic link analysis to determine the earliest separation time of the Space Vehicle (SV) from the Launch Vehicle (LV) while meeting the SV link requirements for Telemetry, Tracking and Control (TT&C) uplink & downlink service
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f4af130e5a167cc4359d8be46f33bbe
https://doi.org/10.1109/aero.2019.8742237
https://doi.org/10.1109/aero.2019.8742237
Publikováno v:
2017 IEEE Aerospace Conference.
Passive intermodulation (PIM) can degrade the transmitted signal quality by acting as an interference signal resulting from subsystem, components, material, poor mechanical connections, and sometimes the physical layout when they fall inside the rece
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9baec0bb5c69fe1c4d2cd12097a17841
https://doi.org/10.1109/aero.2017.7943641
https://doi.org/10.1109/aero.2017.7943641
Publikováno v:
2016 IEEE Aerospace Conference.
Pseudorandom noise (PRN) sequences are used to provide a means to measure the ranging distance between a ground station and a satellite. Satellite Ground Link System (SGLS), Global Positioning System (GPS), and some radars are some of the examples th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea02989d9f391c64b7b1161b757e14d9
https://doi.org/10.1109/aero.2016.7500509
https://doi.org/10.1109/aero.2016.7500509
Autor:
Michelle M. Ardeshiri, Jack K. Kreng
Publikováno v:
2015 IEEE Aerospace Conference.
This paper deals with command and control of a satellite with the effects of turnaround-command signal (TAC) and intermod products (IMs) in the downlink services. Unlike previous papers [2, 3, 5], this paper will show a complete uplink and downlink p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3e347f03d6a26b2dd072300017e44d59
https://doi.org/10.1109/aero.2015.7119156
https://doi.org/10.1109/aero.2015.7119156
Autor:
Julio E. Castro, Jack K. Kreng
Publikováno v:
2014 IEEE Aerospace Conference.
Some satellite communication links for tracking, telemetry, and command (TT&C) make use of modern digital modulation and spread spectrum to survive in a stressed or interference-filled environment. As compared to the conventional tracking, telemetry,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dc83e493e7d8558ef9bc38a89a73f46
https://doi.org/10.1109/aero.2014.6836235
https://doi.org/10.1109/aero.2014.6836235
Autor:
Michelle M. Ardeshiri, Jack K. Kreng
Publikováno v:
2012 IEEE Aerospace Conference.
Many parameters can affect the range correlation and range measurement during a spacecraft's normal range operation as well as in a space vehicle range testing environment. These parameters include the unanticipated voltage standing wave ratio (VSWR)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::292209ce7a1c86e2abb7efaecdd8e6c6
https://doi.org/10.1109/aero.2012.6187135
https://doi.org/10.1109/aero.2012.6187135
Autor:
Srini H. Raghavan, Jack K. Kreng
Publikováno v:
2011 Aerospace Conference.
To mitigate intentional and unintentional in-band interference problems in today's navigation and communication frequency bands, spread-spectrum techniques such as direct sequence (DS) or frequency hopped (FH) systems are frequently used. 1 2 A key c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37d087ae8e17ca61ee3f56bd8852388a
https://doi.org/10.1109/aero.2011.5747353
https://doi.org/10.1109/aero.2011.5747353
Publikováno v:
2010 IEEE Aerospace Conference.
Many satellites using commercial off-the-shelf USB and SGLS transponders such as the L3-Com CXS 2000 do not have turnaround command (TAC) suppression in their downlinks. Without TAC suppression, these satellites exhibit greater downlink service modul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::235d948e94e976fd1671ccd75363fd93
https://doi.org/10.1109/aero.2010.5446918
https://doi.org/10.1109/aero.2010.5446918
Publikováno v:
2007 IEEE Aerospace Conference.
The USB/STDN waveform (unified S-band/spaceflight tracking and data network) has been used to provide telemetry, tracking, and command (TT&C) services for many satellites in addition to NASA near-earth orbital missions. The tracking and command signa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9437288d774cfd0126a68826cc5081a0
https://doi.org/10.1109/aero.2007.352931
https://doi.org/10.1109/aero.2007.352931