i gcás inarb ionann LTGR(dSOR,90°) agus leibhéal torainn foriomlán an rothlúcháin talún roimh éirí de thalamh ag an bhfad pointe dSOR go dtí taobh an SOR.
where LTGR(dSOR,90°) is the overall takeoff ground roll noise level at the point distance dSOR to the side of the SOR.
Tugtar an fheidhm treoireachta SOR, i ndeicibeilí, i gcomhair scaird-aerárthaí faoi chumhacht turba-fean leis an gcothromóid seo a leanas:
The SOR directivity function, in decibels, for turbofan-powered jet aircraft is given by the following equation:
Tugtar an fheidhm treoireachta SOR, i ndeicibeilí, i gcomhair aerárthaí faoi chumhacht inneall turba-liáin leis an gcothromóid seo a leanas:
The SOR directivity function, in decibels, for turboprop-powered aircraft is given by the following equation:
Nuair a bhíonn aerárthach ag éirí de thalamh, de réir mar a luasghéaraíonn sé idir an pointe scaoilte coscán (ar a dtugtar Scaoileadh Coscán SOR freisin) agus pointe an éirí de thalamh, athraíonn an luas go mór thar fhad 1500 go dtí 2500 m, ó nialas go dtí idir 80 agus 100 m/s.
When taking off, as an aircraft accelerates between the point of brake release (alternatively termed Start-of-Roll SOR) and the point of lift-off, speed changes dramatically over a distance of 1500 to 2500 m, from zero to between around 80 and 100 m/s.
Fuarthas an fheidhm ΔSOR ó roinnt feachtas chun torann a thomhas agus micreafóin á n-úsáid a bhí suite go hiomchuí taobh thiar de SOR an scairdeitleáin agus é ag imeacht nó taobh leis.
The function ΔSOR has been derived from several noise measurement campaigns using microphones adequately positioned behind and on the side of the SOR of departing jet aircraft.
Léiríonn an fheidhm ΔSOR éagsúlacht an torainn fhoriomláin a thagann ón rothlúchán talún roimh éirí de thalamh arna thomhas taobh thiar de thús an rothlúcháin, i gcoibhneas leis an torann foriomlán ón rothlúchán talún roimh éirí de thalamh arna thomhas ar thaobh an SOR, ag an bhfad céanna:
The function ΔSOR represents the variation of the overall noise emanating from the takeoff ground roll measured behind the start of roll, relatively to the overall noise from takeoff ground roll measured on the side of the SOR, at the same distance:
An fheidhm ΔSOR a dtugtar tuairisc uirthi thuas, gabhann sí éifeacht treoireachta shuntasach na coda tosaigh den rothlúchán roimh éirí de thalamh ag suíomhanna taobh thiar den SOR den chuid is mó (toisc gurb é an ceann is gaire do na glacadóirí, lena mbaineann an cóimheas is airde idir treoluas líneach agus luas an aerárthaigh).
The ΔSOR function described above mostly captures the pronounced directivity effect of the initial portion of the takeoff roll at locations behind the SOR (because it is the closest to the receivers, with the highest jet velocity to aircraft speed ratio).
Administrador de Infraestructuras Ferroviarias (ADIF), Entidad Pública Empresarial, cuideachta chorparáideach phoiblí atá cláraithe faoi dhlí na Spáinne (cláruimhir: Q2801660H), agus a bhfuil a oifig chláraithe in Calle Sor Ángela de la Cruz, 3, 28020 Maidrid, an Spáinn
Administrador de Infraestructuras Ferroviarias (ADIF), Entidad Pública Empresarial, a public corporate company registered under Spanish law (registration number: Q2801660H), with its registered office at Calle Sor Ángela de la Cruz, 3, 28020 Madrid, Spain