# SATOBS 2003 OCTOBER 15/16

From: Peter Wakelin (peter@ascotrig.demon.co.uk)
Date: Thu Oct 16 2003 - 09:13:38 EDT

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```96-29F:  First position is mid point of tether but second is that of Ralph.

I had hoped to get several hours' sleep between the evening and morning sessions
but it wasn't to be.  When observing TiPS I noticed that the tether seemed to
subtend an unusually large angle.  Lying in bed I was puzzling over this and
wondering where in the sky the tether would appear longest.  Assuming a circular
orbit and a vertical tether I deduced that the apparent length is a function of
elevation only but I could not puzzle out the mathematics to find this
elevation.  I guess it to be around 40 degrees.

I then wondered if the elevation would be the same if TiPs was at a different
height and concluded that in a lower orbit the tether would be nearer to
perpendicular to the line of sight for a given elevation so the elevation for
maximum tether length would not be the same but probably lower.

Can anyone help me with this problem please?  I mean with the maths - I'm not
seeking suggestions for what else I should get up to in bed to take my mind off
TiPS.

SATOBS
9101701201803101518013107  01   12114416  +73096   1  5             +5         S
9101701201803101518022199  01   12190654  +80329   1  5             +3         S
9101701201803101518034274  01   12215540  +36088   1  5             +3         S
9101701201803101518041925  01   12220737  +19284   1  5             +3         S
9108201201803101518103241  01   12214094  +03536   1  5             +6 +8      R
9108201201803101518103691  01   12214115  +05001   2  5             +6 +8      R
9108201201803101518114946  01   12214787  +28389   1  5             +6 +8      R
9108201201803101518142160  01   12053947  +83231   1  5             +5 +7      R
9501501201803101518171971  01   12181061  +03189   1  5             -1 +5      I
9501501201803101518183249  01   12171091  +24131   1  5             +6 +7      R
9501501201803101518200742  01   12144970  +48338   1  5             +7 INV     R
9602906201803101518314330  01   12170046  +75135   1  5
9602906201803101518330216  01   12032997  +77155   1  5             +7 +8      I
0104003201803101518361480  01   12141841  +38540   2  5             +6         S
0104001201803101518370723  01   12150474  +38373   1  5             +5         S
9701201201803101518382156  01   12230672  +28581   1  5             +5         S
9701201201803101518392448  01   12235095  +54044   1  5             +6         S
9701201201803101518395589  01   12004250  +65473   1  5             +6 +7      R
9701201201803101518411966  01   12062762  +73502   1  5             +6 +7      R
8401204201803101518432598  01   12203751  +75128   1  5             +8         S
8401204201803101518432926  01   12204854  +74294   1  5             +8         S
8401204201803101518444871  01   12224203  +52334   1  5             +8         S
9405701201803101518480598  01   12151287  +19206   1  5             +7         S
9405701201803101518491434  01   12141447  +29042   1  5             +7 +8      R
7905001201803101518511602  01   12153907  +16353   1  5             +8         S
9602903201803101518525714  01   12102418  +65344   1  5             +5         S
9602904201803101518533476  01   12090268  +68529   1  5             +6         S
9602905201803101518534092  01   12090272  +68533   1  5             +6         S
0104002201803101519030213  01   12145584  +20328   1  5             +6 +8      R
0104002201803101519040192  01   12153597  +16056   1  5             +5 +8      R
0104002201803101519055858  01   12165489  +03376   1  5             +7 +8      I
0004701201803101519073224  01   12160281  -03394   1  5             +5         S
9800701201803101519100688  01   12183840  +11274   1  5             +6         S
9800701201803101519115239  01   12160931  +35436   1  5             +7         S
8401201201803101519280805  01   12205900  +22204   1  5             +8         S
8401201201803101519290125  01   12213160  +12544   1  5             +7         S
8401201201803101519294444  01   12215184  +06168   1  5             +7         S
8300801201803101519311361  01   12064560  +62400   1  5             +9         S
8401203201803101519335673  01   12212942  +26286   1  5             +8         S
7111001201803101519353965  01   12233233  +26320   1  5             +9         S
8401206201803101519374230  01   12222466  +16565   1  5             +8         S
8401206201803101519383880  01   12224676  +07564   1  5             +9         S
7111003201803101519421522  01   12203054  +34287   1  5             +9         S
8906104201803101519444540  01   12180221  +58485   1  5             +8         S
8906104201803101519445387  01   12180761  +58585   1  5             +8         S
8906104201803101519463966  01   12191455  +59502   1  5             +9         S
7111004201803101520000222  01   12200147  +25491   2  5             10         S
7111004201803101520001075  01   12201055  +23254   1  5             10         S
9701201201803101520195542  01   12172038  +15585   1  5             +6 +8   190R
8001904201803101602542925  01   12144747  +73310   1  5             +8         S
8001904201803101602543792  01   12142960  +72163   1  5             +8         S
9107603201803101602593277  01   12073962  +66162   1  5             +6         S
9107604201803101603004657  01   12080502  +47546   1  5             +5         S
9107605201803101603012253  01   12080385  +38381   1  5             +6         S
9107604201803101603022070  01   12081913  +26198   1  5             +7         S
9107605201803101603034125  01   12082206  +13077   1  5             +7         S
7609101201803101603193412  01   12115688  +47481   1  5             +7 INV     R
7609101201803101603205688  01   12140566  +55203   2  5             +7 INV     R
7609101201803101603210465  01   12141782  +55265   1  5             +7 INV     R
9902301201803101603261447  01   12033525  +02043   1  5             +7         S
9902301201803101603272966  01   12034859  +02257   1  5             +7         S
9902801201803101603285307  01   12222112  +41357   1  5             +6 +7      R
9902801201803101603285642  01   12222131  +41479   1  5             +6 +7      R
9902801201803101603315596  01   12223728  +53582   1  5             +6 +7      R
8001907201803101603335251  01   12202073  +82221   2  5             +9         S
8001907201803101603344702  01   12145359  +78071   2  5             +9         S
8001901201803101603383646  01   12193912  +76262   1  5             +9         S
8001901201803101603391867  01   12164929  +76384   1  5             +9         S
8001901201803101603395899  01   12150560  +71536   1  5             +9         S
9902801201803101603432327  01   12094629  +61535   1  5             +6 +7      I
8001903201803101603462859  01   12210522  +61497   1  5             +9         S
8001903201803101603463567  01   12205657  +63010   1  5             +9         S
8001903201803101603474076  01   12185153  +71106   2  5             +8         S
9005003201803101603494643  01   12112552  +42350   1  5             +6         S
9005005201803101603495167  01   12112825  +43473   2  5             +6         S
9005004201803101603511061  01   12122339  +39450   1  5             +6         S
8704305201803101603530266  01   12061749  +71345   1  5             +8         S
8704305201803101603540624  01   12105690  +70010   1  5             +8         S
8704306201803101603561883  01   12042948  +66097   2  5             +8         S
8704301201803101603595167  01   12230094  +76514   1  5             +8         S
8704301201803101604003313  01   12181818  +82526   1  5             +8         S
8704308201803101604024021  01   12123097  +65539   1  5             +8         S
8704308201803101604024723  01   12123776  +64353   2  5             +8         S
7711206201803101604224055  01   12083597  +01595   1  5             +8         S
7711206201803101604235385  01   12101247  +17123   1  5             +8         S
7711206201803101604235686  01   12101632  +17425   1  5             +8         S
8001904201803101604450364  01   12185151  +71099   2  5             +9         S
8001904201803101604463415  01   12153130  +66390   1  5             +9         S
9107603201803101604483754  01   12015911  +33126   1  5             +6         S
9107605201803101604484341  01   12015788  +33103   1  5             +6         S
9107604201803101604484558  01   12015821  +33410   2  5             +6         S
9107605201803101604510290  01   12040901  +17206   1  5             +6         S
9107604201803101604515484  01   12045252  +09522   1  5             +5         S
7711204201803101604550409  01   12060415  +21291   2  5             +7         S
9706401201803101604562693  01   12090945  -14132   1  5             +5         S
7609101201803101604575343  01   12042400  +24181   1  5             +6         S
7609101201803101604583274  01   12033370  +37521   2  5             +6         S
7609101201803101605000600  01   12002665  +56132   1  5             +7         S
7711201201803101605053971  01   12043876  +08077   2  5             +7         S
7711201201803101605063231  01   12052962  +29118   1  5             +7         S
7711201201803101605075278  01   12092074  +61230   1  5             +7         S
7711201201803101605085622  01   12124281  +57023   1  5             +8         S
7504301201803101605145366  01   12132037  +40083   1  5             +5 +7      I
7504301201803101605152753  01   12140208  +46020   1  5             +6 +7      I
999
--
Peter Wakelin
COSPAR 2018 GUNDLETON,  Lat 51.0945N  Long 1.1188W  124m

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This archive was generated by hypermail 2b29 : Thu Oct 16 2003 - 09:27:39 EDT