Estive a fazer umas contas rápidas<div>mas esta-me a sair tudo complexo demais.</div><div>Pelos dados que tinha, tentei fazer uma estimativa, mas se calhar os dados que tinha não estavam correctos.</div><div><br></div><div>
Ora </div><div>No Órbita 288, apontei num papel que o Pereigeu era de 375Km</div><div>Cada dia dá 15.61337191 orbitas</div><div><br></div><div>Hoje na órbita 445 o Perigeu está nos 373 Km</div><div>e a órbita agora 15.62015785 </div>
<div><br></div><div>Para atingir o ponto de não-retorno o Sat tem de chegar ou 78Km de altitude.</div><div>Isto deu-me 23 mil e tal órbitas à volta de 1500 dias.</div><div>Pois eu sei, é demais há aqui dados incorrectos...</div>
<div>Além do mais, não estou a conseguir perceber como calcular a aceleração que é de 0,00044586.... por órbita.</div><div>Mas ainda assim creio que não seja tão linear.</div><div><br></div><div>Matemática.</div><div><br>
</div><div>Alguém tem mais dados sobre o Sat numa órbita antiga?</div><div> Isto parece um bom desafio para lançar aí numa escola ao miúdos</div><div>Nesta matéria faltaram-me muitas réguadas.</div><div><br></div><div>73</div>
<div>Matias</div><div><br><div class="gmail_quote">2011/9/2 João Gonçalves Costa <span dir="ltr"><<a href="mailto:joao.a.costa@ctt.pt">joao.a.costa@ctt.pt</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div lang="PT" link="blue" vlink="purple"><div><p class="MsoNormal"><span style="font-size:11.0pt;color:#1F497D"><u></u> <u></u></span></p><h3><span style="font-size:14.0pt;color:midnightblue;background:white">ARISSatContest<u></u><u></u></span></h3>
<h3><u></u><img width="83" height="93" align="right"><u></u><span style="color:midnightblue;background:white"><img width="150" height="93" alt=""Oh my goodness!" said Chicken Little. "The sky is falling!" I must go and tell the king!""></span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:18.0pt;color:red;background:white">"Oh my goodness!" said Chicken Little. "The sky is falling! I must go and tell the king!"</span><span style="font-size:12.0pt;color:midnightblue;background:white"> </span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:14.0pt;color:midnightblue;background:white"><br>AMSAT is happy to announce the ARISSat-1/KEDR Chicken Little Contest. This is your opportunity to calculate, or guess, when ARISSat-1/KEDR falls out of orbit. This is defined as the time it crosses an altitude of 78 kilometers, which is considered to be the point of no return. While not part of the contest, the actual reentry may be visible depending on location. Reports are encouraged. </span><span style="font-size:12.0pt;color:midnightblue;background:white"><br>
<br>As in the past, we will have three divisions: <br><br></span><span style="font-size:14.0pt;color:#339966;background:white">Student category for Kindergarten through grade 8 .<br>Student category for High School, grades 9 through 12 .<br>
All others will be in the adult category. </span><span style="font-size:12.0pt;color:midnightblue;background:white"><br><br>In addition to individual students, we encourage classes or organizations such as science clubs to make group submissions. Submissions are limited to one per person or group. Members of a group making a submission may not submit a second, individual entry. <br>
<br>Adults and individual students should include their name and amateur callsign if they have one. </span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3><h3 align="center" style="text-align:center">
<span style="font-size:12.0pt;color:midnightblue;background:white">Individual students should also give their grade in school. <br>Student groups should include the name of their group or class, school, and which category they represent. </span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:12.0pt;color:midnightblue;background:white">Please give the UTC date in the format of day, month, year, hours, minutes, and seconds. </span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:12.0pt;color:midnightblue;background:white">Finally, we would like to know your city, state, province or region, and your country. </span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:12.0pt;color:midnightblue;background:white">Submissions will close on 15 October 2011 at 23:59:00 UTC. <br>The closest predictions in each category will be recognized for their achievement.</span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:12.0pt;color:midnightblue;background:white">Send your submissions to <a href="mailto:CHICKENLITTLE@ARISSAT1.ORG" target="_blank">CHICKENLITTLE@ARISSAT1.ORG</a>.</span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<h3 align="center" style="text-align:center"><span style="font-size:12.0pt;color:midnightblue;background:white"> Good luck!</span><span style="font-size:14.0pt;color:midnightblue;background:white"><u></u><u></u></span></h3>
<div><p class="MsoNormal"><u></u> <u></u></p></div><p class="MsoNormal">-- <br>António Matias<u></u><u></u></p><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">CT1FFU - CR5A <u></u><u></u></p></div>
<div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><a href="http://www.dxpatrol.com" target="_blank">www.dxpatrol.com</a> <u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div>
<div><p class="MsoNormal">QRV: HF, 6m, 4m,2m,70cm,23cm<u></u><u></u></p></div><div><p class="MsoNormal">SSB, CW, MGM<u></u><u></u></p></div><div><p class="MsoNormal">DX, EME, Contest,Sat.<u></u><u></u></p></div><div><p class="MsoNormal">
<u></u> <u></u></p></div><p class="MsoNormal"><span style="color:#1F497D">Fonte:</span><span style="font-size:10.0pt"> ct-comunicacoes-e-tecnologias <b>Em nome de </b>António Matias</span><u></u><u></u></p><p class="MsoNormal">
-- <br><font color="#888888">Para mais informações/opções visite o site, e edite a sua conta:<br><a href="http://groups.google.com/group/ct-comunicacoes-e-tecnologias?hl=en?hl=pt-PT" target="_blank">http://groups.google.com/group/ct-comunicacoes-e-tecnologias?hl=en?hl=pt-PT</a><u></u><u></u></font></p>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>António Matias<div><br></div><div>CT1FFU - CR5A </div><div><br></div><div><a href="http://www.dxpatrol.com" target="_blank">www.dxpatrol.com</a> </div><div>
<br></div><div>QRV: HF, 6m, 4m,2m,70cm,23cm</div><div>SSB, CW, MGM</div><div>DX, EME, Contest,Sat.</div><div><br></div><br>
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