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- f01cb5c4-0ed4-4a83-8c0c-9b954fdb697e type Concept @default.
- f01cb5c4-0ed4-4a83-8c0c-9b954fdb697e broader 92ddaaca-40b2-4936-bc1a-28cc5743e8b8 @default.
- f01cb5c4-0ed4-4a83-8c0c-9b954fdb697e definition "Path = ['Radar Altimeters', 'Altimeters', 'Active Remote Sensing', 'Earth Remote Sensing Instruments', 'Instruments'] Poseidon-2 is a nadir-looking radar altimeter that maps the topography of the sea surface. Derived from the Poseidon-1 (ALT) altimeter on Topex/Poseidon, it measures sea level, wave heights and wind speed determined from the shape and strength of the radar-return pulse. The altimeter emits a radar beam that is reflected back to the antenna from the Earth's surface. Poseidon-2 operates at two frequencies (13.6 GHz in the Ku-band, 5.3 GHz in the C-band) to determine atmospheric electron content, which affects the radar signal path delay. These two frequencies also serve to measure the amount of rain in the atmosphere. Poseidon-2 was designed by Alcatel Space Industries (ASPI) for CNES Toulouse Space Center, and is essentially an improved version of the Poseidon-1 altimeter that flies on TOPEX/Poseidon. Poseidon-2 improves on Poseidon-1 by adding a second frequency at 5.3 GHz, changing to digital technology, and using a new more powerful rad-hard microprocessor. It makes these improvements while keeping the same compact mass and size as its predecessor. Key Poseidon-2 Facts Heritage: Poseidon-1 radar altimeter (TOPEX/Poseidon) Instrument Type: Dual-frequency radar Altimeter (Ku-band and C-band) Scan Type: Fixed nadir-pointing beam Transmitted Pulse Width: 105 s Pulse Repetition Frequency: 2100 Hz (1800 Hz for Ku-band and 300 Hz for C-band) Maximum Radio-Frequency Output Power to Antenna: 38.5 dBm (Ku-band); 44 dBm (C-band) Transmission Frequency: 13.575 GHz (Ku-band), 5.3 GHz (C-band) Dimensions: Radio Frequency Unit (RFU): 42.2 cm ý 24.6 cm ý 24.5 cm; Power Control (PC) Unit: 26.8 cm ý 20.5 cm ý 24.9 cm Mass: 52 kg (dual-frequency, dual configuration with one antenna) Power: 66 W DC Supply Bus: Unregulated 21\u201332 V Duty Cycle: 100% Thermal Operating Range: -5ý to 35ý C Pointing Requirements (platform + instrument, 3Ã): Control (Satellite): 0.33ý; Knowledge: < 0.1ý Group: Instrument_Details Entry_ID: POSEIDON-2 Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Active Remote Sensing Instrument_Type: Altimeters Instrument_Subtype: Radar Altimeters Short_Name: POSEIDON-2 Long_Name: JASON-1 RADAR ALTIMETER End_Group Group: Associated_Platforms Short_Name: JASON-1 End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Microwave Spectral_Frequency_Coverage_Range: 38.5 dBm (Ku-band); 44 dBm (C-band) End_Group Online_Resource: http://sealevel.jpl.nasa.gov/technology/instrument.html Online_Resource: http://www.jason.oceanobs.com/html/missions/jason/instruments/poseidon2_uk.html Sample_Image: http://topex-www.jpl.nasa.gov/science/images/invest-jason-1-th.gif Creation_Date: 2007-04-16 Group: Instrument_Logistics Data_Rate: 22.5 kbps Instrument_Start_Date: 2002-01-15 Instrument_Owner: NASA Instrument_Owner: CNES End_Group End_Group" @default.
- f01cb5c4-0ed4-4a83-8c0c-9b954fdb697e inScheme concept_scheme @default.
- f01cb5c4-0ed4-4a83-8c0c-9b954fdb697e prefLabel "POSEIDON_2" @default.
!["Path = ['Radar Altimeters', 'Altimeters', 'Active Remote Sensing', 'Earth Remote Sensing Instruments', 'Instruments'] Poseidon-2 is a nadir-looking radar altimeter that maps the topography of the sea surface. Derived from the Poseidon-1 (ALT) altimeter on Topex/Poseidon, it measures sea level, wave heights and wind speed determined from the shape and strength of the radar-return pulse. The altimeter emits a radar beam that is reflected back to the antenna from the Earth's surface. Poseidon-2 operates at two frequencies (13.6 GHz in the Ku-band, 5.3 GHz in the C-band) to determine atmospheric electron content, which affects the radar signal path delay. These two frequencies also serve to measure the amount of rain in the atmosphere. Poseidon-2 was designed by Alcatel Space Industries (ASPI) for CNES Toulouse Space Center, and is essentially an improved version of the Poseidon-1 altimeter that flies on TOPEX/Poseidon. Poseidon-2 improves on Poseidon-1 by adding a second frequency at 5.3 GHz, changing to digital technology, and using a new more powerful rad-hard microprocessor. It makes these improvements while keeping the same compact mass and size as its predecessor. Key Poseidon-2 Facts Heritage: Poseidon-1 radar altimeter (TOPEX/Poseidon) Instrument Type: Dual-frequency radar Altimeter (Ku-band and C-band) Scan Type: Fixed nadir-pointing beam Transmitted Pulse Width: 105 s Pulse Repetition Frequency: 2100 Hz (1800 Hz for Ku-band and 300 Hz for C-band) Maximum Radio-Frequency Output Power to Antenna: 38.5 dBm (Ku-band); 44 dBm (C-band) Transmission Frequency: 13.575 GHz (Ku-band), 5.3 GHz (C-band) Dimensions: Radio Frequency Unit (RFU): 42.2 cm ý 24.6 cm ý 24.5 cm; Power Control (PC) Unit: 26.8 cm ý 20.5 cm ý 24.9 cm Mass: 52 kg (dual-frequency, dual configuration with one antenna) Power: 66 W DC Supply Bus: Unregulated 21\u201332 V Duty Cycle: 100% Thermal Operating Range: -5ý to 35ý C Pointing Requirements (platform + instrument, 3Ã): Control (Satellite): 0.33ý; Knowledge: < 0.1ý Group: Instrument_Details Entry_ID: POSEIDON-2 Group: Instrument_Identification Instrument_Category: Earth Remote Sensing Instruments Instrument_Class: Active Remote Sensing Instrument_Type: Altimeters Instrument_Subtype: Radar Altimeters Short_Name: POSEIDON-2 Long_Name: JASON-1 RADAR ALTIMETER End_Group Group: Associated_Platforms Short_Name: JASON-1 End_Group Group: Spectral_Frequency_Information Wavelength_Keyword: Microwave Spectral_Frequency_Coverage_Range: 38.5 dBm (Ku-band); 44 dBm (C-band) End_Group Online_Resource: http://sealevel.jpl.nasa.gov/technology/instrument.html Online_Resource: http://www.jason.oceanobs.com/html/missions/jason/instruments/poseidon2_uk.html Sample_Image: http://topex-www.jpl.nasa.gov/science/images/invest-jason-1-th.gif Creation_Date: 2007-04-16 Group: Instrument_Logistics Data_Rate: 22.5 kbps Instrument_Start_Date: 2002-01-15 Instrument_Owner: NASA Instrument_Owner: CNES End_Group End_Group"](?object=%22Path%20%3D%20%5B'Radar%20Altimeters'%2C%20'Altimeters'%2C%20'Active%20Remote%20Sensing'%2C%20'Earth%20Remote%20Sensing%20Instruments'%2C%20'Instruments'%5D%0APoseidon-2%20is%20a%20nadir-looking%20radar%20altimeter%20that%20maps%20the%20topography%20of%20the%20sea%20surface.%20Derived%20from%20the%20Poseidon-1%20(ALT)%20altimeter%20on%20Topex%2FPoseidon%2C%20it%20measures%20sea%20level%2C%20wave%20heights%20and%20wind%20speed%20determined%20from%20the%20shape%20and%20strength%20of%20the%20radar-return%20pulse.%20The%20altimeter%20emits%20a%20radar%20beam%20that%20is%20reflected%20back%20to%20the%20antenna%20from%20the%20Earth's%20surface.%20Poseidon-2%20operates%20at%20two%20frequencies%20(13.6%20GHz%20in%20the%20Ku-band%2C%205.3%20GHz%20in%20the%20C-band)%20to%20determine%20atmospheric%20electron%20content%2C%20which%20affects%20the%20radar%20signal%20path%20delay.%20These%20two%20frequencies%20also%20serve%20to%20measure%20the%20amount%20of%20rain%20in%20the%20atmosphere.%0A%0APoseidon-2%20was%20designed%20by%20Alcatel%20Space%20Industries%20(ASPI)%20for%20CNES%20Toulouse%20Space%20Center%2C%20and%20is%20essentially%20an%20improved%20version%20of%20the%20Poseidon-1%20altimeter%20that%20flies%20on%20TOPEX%2FPoseidon.%20Poseidon-2%20improves%20on%20Poseidon-1%20by%20adding%20a%20second%20frequency%20at%205.3%20GHz%2C%20changing%20to%20digital%20technology%2C%20and%20using%20a%20new%20more%20powerful%20rad-hard%20microprocessor.%20It%20makes%20these%20improvements%20while%20keeping%20the%20same%20compact%20mass%20and%20size%20as%20its%20predecessor.%0A%0AKey%20Poseidon-2%20Facts%0AHeritage%3A%20Poseidon-1%20radar%20altimeter%20(TOPEX%2FPoseidon)%0AInstrument%20Type%3A%20Dual-frequency%20radar%20Altimeter%20(Ku-band%20and%20C-band)%0AScan%20Type%3A%20Fixed%20nadir-pointing%20beam%0ATransmitted%20Pulse%20Width%3A%20105%20s%0APulse%20Repetition%20Frequency%3A%202100%20Hz%20(1800%20Hz%20for%20Ku-band%20and%20300%20Hz%20for%20C-band)%0AMaximum%20Radio-Frequency%20Output%0APower%20to%20Antenna%3A%2038.5%20dBm%20(Ku-band)%3B%2044%20dBm%20(C-band)%0ATransmission%20Frequency%3A%2013.575%20GHz%20(Ku-band)%2C%205.3%20GHz%20(C-band)%0ADimensions%3A%20Radio%20Frequency%20Unit%20(RFU)%3A%2042.2%20cm%20%C3%BD%2024.6%20cm%20%C3%BD%2024.5%20cm%3B%0APower%20Control%20(PC)%20Unit%3A%2026.8%20cm%20%C3%BD%2020.5%20cm%20%C3%BD%2024.9%20cm%0AMass%3A%2052%20kg%20(dual-frequency%2C%20dual%0Aconfiguration%20with%20one%20antenna)%0APower%3A%2066%20W%0ADC%20Supply%20Bus%3A%20Unregulated%2021%5Cu201332%20V%0ADuty%20Cycle%3A%20100%25%0AThermal%20Operating%20Range%3A%20-5%C3%BD%20to%2035%C3%BD%20C%0APointing%20Requirements%20(platform%20%2B%20instrument%2C%203%C3%83)%3A%20Control%20(Satellite)%3A%200.33%C3%BD%3B%20Knowledge%3A%20%3C%200.1%C3%BD%0A%0A%0AGroup%3A%20Instrument_Details%0A%20%20%20Entry_ID%3A%20POSEIDON-2%0A%20%20%20Group%3A%20Instrument_Identification%0A%20%20%20%20%20%20Instrument_Category%3A%20Earth%20Remote%20Sensing%20Instruments%0A%20%20%20%20%20%20Instrument_Class%3A%20Active%20Remote%20Sensing%0A%20%20%20%20%20%20Instrument_Type%3A%20Altimeters%0A%20%20%20%20%20%20Instrument_Subtype%3A%20Radar%20Altimeters%0A%20%20%20%20%20%20Short_Name%3A%20POSEIDON-2%0A%20%20%20%20%20%20Long_Name%3A%20JASON-1%20RADAR%20ALTIMETER%0A%20%20%20End_Group%0A%20%20%20Group%3A%20Associated_Platforms%0A%20%20%20%20%20%20Short_Name%3A%20JASON-1%0A%20%20%20End_Group%0A%20%20%20Group%3A%20Spectral_Frequency_Information%0A%20%20%20%20%20%20Wavelength_Keyword%3A%20Microwave%0A%20%20%20%20%20%20Spectral_Frequency_Coverage_Range%3A%2038.5%20dBm%20(Ku-band)%3B%2044%20dBm%20(C-band)%0A%20%20%20End_Group%0A%20%20%20Online_Resource%3A%20http%3A%2F%2Fsealevel.jpl.nasa.gov%2Ftechnology%2Finstrument.html%0A%20%20%20Online_Resource%3A%20http%3A%2F%2Fwww.jason.oceanobs.com%2Fhtml%2Fmissions%2Fjason%2Finstruments%2Fposeidon2_uk.html%0A%20%20%20Sample_Image%3A%20http%3A%2F%2Ftopex-www.jpl.nasa.gov%2Fscience%2Fimages%2Finvest-jason-1-th.gif%0A%20%20%20Creation_Date%3A%202007-04-16%0A%20%20%20Group%3A%20Instrument_Logistics%0A%20%20%20%20%20%20Data_Rate%3A%2022.5%20kbps%0A%20%20%20%20%20%20Instrument_Start_Date%3A%202002-01-15%0A%20%20%20%20%20%20Instrument_Owner%3A%20NASA%0A%20%20%20%20%20%20Instrument_Owner%3A%20CNES%0A%20%20%20End_Group%0AEnd_Group%22%40en){kind=link}