Correcting TLEs at epoch: Application to the GPS constellation

Ly, Delphine; Lucken, Romain; Giolito, Damien

doi:10.1016/j.jsse.2020.07.032

Cited by 8 publications

(5 citation statements)

References 6 publications

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“…are within the accuracy of the TLEs themselves, as positional errors generally vary from a minimum error of approximately 1 km at the TLE's epoch up to 5 km, depending on the age of the TLE [36], [37]. These uncertainties could potentially mask any systematic biases or offsets, either from the system itself or from the ionosphere [38], [39].…”

Section: Resultsmentioning

confidence: 97%

Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space

Hennessy¹,

Young²,

Tingay³

et al. 2022

Remote Sensing

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This paper describes the use of the Murchison Widefield Array, a low-frequency radio telescope at a radio-quiet Western Australian site, as a radar receiver forming part of a continent-spanning multistatic radar network for the surveillance of space. This paper details the system geometry employed, the orbit-specific radar signal processing, and the orbit determination algorithms necessary to ensure resident space objects are detected, tracked, and propagated. Finally, the paper includes the results processed after a short collection campaign utilising several FM radio transmitters across the country, up to a maximum baseline distance of over 2500 km. The results demonstrate the Murchison Widefield Array is able to provide widefield and persistent coverage of objects in low Earth orbit.

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Section: Resultsmentioning

confidence: 97%

Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space

Hennessy¹,

Young²,

Tingay³

et al. 2022

Remote Sensing

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“…It is not clear how to asses the magnitude of the error [5], many studies have tried to estimate the precision of the TLE by comparison with GPS and laser ranging data (e.g. [6,12]) and the results vary upon the satellite's orbit. For a LEO satellite the initial orbital position error is estimated to be in the order of 1-2 km at-epoch.…”

Section: Error Of Tle Prediction Vs Pseudo-observation Data (Cpf Files)mentioning

confidence: 99%

Evaluation of Satellite’s Point-Ahead Angle Derived from TLE for Laser Communication

Lazzaro

Bettanini

2022

Aerotec. Missili Spaz.

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Advances in lasers, optics and electronics for Satellite’s optical communication are opening the possibility of very high performance near Earth space links with data rate up to several Gbps. Being the divergence of the laser beam typically of tens of $$\mu$$ μ rad, an extremely high precision pointing is needed to correctly establish and maintain data optical link. In particular, the relative motion between the satellite and the ground station shall be accurately evaluated to estimate how to correct pointing angles for future orbital locations. This correction is made via a point-ahead mirror (PAM) mechanism, which deviates the laser beam by an angle called point-ahead angle (PAA). The purpose of this paper is evaluate the possibility of accurately estimate the point-ahead angle in advance using the two-line elements sets for the orbiting satellite, which are available before the ground station overpass. The study evaluated TLE-based orbital evolution of Sentinel-6 satellite, comparing the results with the high precision data obtained by laser ranging from the crustal dynamics data information system (CDDIS). The maximum error observed between the estimated and measured point-ahead angles was less than 1$$\mu$$ μ rad, demonstrating the possibility of this point-ahead correction technique for LEO orbiting satellites.

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“…Koordinat posisi satelit dapat dicari menggunakan data parameter orbit dengan format NORAD atau yang bisa disebut dnegan TLE (Two Line Element). PLAN-13 merupakan algoritma perhitungan matematis yang dikembangkan oleh James Miller menggunakan algoritma pemrograman [2] [13]. Perhitungan dilakunakan menggunakan data berupa TLE (Two Line Element) yang dikalkukasi bersamaan dengan waktu dan tanggal terkini.hasil dari perhitungan menggunakan algoritma ini berupa koordinat satelit latitude dan longitude.…”

Section: Korodinat Latitude Dan Longitudeunclassified

“…SLat-OBLat < 0 dan SLon-OBLon < 0, 𝐴𝑧𝑖𝑚𝑢𝑡ℎ = 270 − 𝐴𝑧 (12). SLat-OBLat > 0 dan SLon-OBLon < 0, 𝐴𝑧𝑖𝑚𝑢𝑡ℎ = 270 − 𝐴𝑧 (13).…”

Section: Azimuth Dan Elevationunclassified

Antena Tracker Televisi Satelit Dengan Algoritma Matematis Sebagai Prediksi Koordinat

pradipta

Joni

Ubaidillah

et al. 2021

JASEE

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Satelit merupakan sebuah trobosan terbaru dalam proses pengiriman data. Satelit dapat digunakan untuk memantau keaadaan atmosfer bumi, navigasi, maupun komunikasi data jarak jauh sebagai contoh broadcast televisi Pada dasarbya antena penerima akan diarahkan secara manual oleh pengguna agar pengarahan antena tepat menuju posisi satelit broadcast televisi sesuai dan mudah, maka dapat digunakannya perangkat berupa antena tracking. Untuk mendapatkan posisi koordinat satelit digunakan perhitungan algoritma matematis. Penelitian ini penulis menggunakan satelit MEASAT-3A dengan hasil perhitungan pada waktu 1 Januari 2021 pukul 00:00:00 didapatkan posisi satelit terletak pada koordinat latitude -0,0232174734074105°, longitude 91,8487688254899° dan altitude 35784, 6417029739 Km. Posisi dari antena tracker berada pada koordinat latitude -7.128558069°, longitude 112.725319020 dan altitude 0.0300 Km. Didapatkan arah putar dari antena tracker berupa nilai azimuth 288,7960234° dan elevation °. keberhasilan dari pergerakan sudut putar antena tracker terhadap SetPoint sudut Azimuth dan Elevation sebesar 9,74380501% dan 99,86132262%.

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Correcting TLEs at epoch: Application to the GPS constellation

Cited by 8 publications

References 6 publications

Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space

Establishing the Capabilities of the Murchison Widefield Array as a Passive Radar for the Surveillance of Space

Evaluation of Satellite’s Point-Ahead Angle Derived from TLE for Laser Communication

Antena Tracker Televisi Satelit Dengan Algoritma Matematis Sebagai Prediksi Koordinat

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