*On the left: the BepiColombo spacecraft, the MORE - Mercury Orbiter Radioscience Experiment - logo and team. BepiColombo is an ESA mission dedicated to the exploratcion of Mercury. Launch: 2014.*

Students admitted to the exams in simplified mode must have a "yes" in the last column.

**Click here to download the test**

The solution (a pdf file) and the source code must be emailed by Sunday May 31 23:59 UTC to luciano.iess@uniroma1.it AND mircojunior.mariani@uniroma1.it. NO EXCEPTIONS!

Suggestions and remarks: Be concise and go right to the point. Plots convey information very effectively. Including a working source code is mandatory.

**MSS 2105 Challenge - Winners:**

- Gaeta 3 pt

- Di Ruscio 2 pt

- Panicucci 2 pt

Congratulations to all participants (34)!

Caputo, Iovallo, Mangionami, Moriero, Palombi, Pica, and Piermarini passed the test.

MSS 2015 Challenge (this is a new file specifying some missing units - 4:46 pm May 8).

If you have questions, Paolo Racioppa (06 44585976) and/or I will be available till 7 pm, today, May 8. Good luck to all participants!

Clarifications (we will try to put all of them online):

1) h is the altitude above the surface.

2) You are free to take the atmosphere as non-rotating. This leads to a minor simplification of the problem. In general, when some information is not provided, make reasonable assumptions.

Matlab code for the coherent demodulator

Suggestions and remarks: Be concise and go right to the point. Plots convey information very effectively. Including a working source code is mandatory.

**___________________________________________________________ **

**MSS 2014 - Home test n. 2 **

Email the code and the report to luciano.iess@uniroma1.it AND mircojunior.mariani@uniroma1.it by Friday May 30 23:59:59.

Students passing both home tests (or the challenge and the second test) will be entitled to take the exam in a simplified mode.

**Clarification #1**: you may neglect the torque variations due to the eclipses.

**Clarification #2**: if needed, you may use this matlab routine to solve Kepler's equation.

**Clarification #3**: The angular momentum storage capacity is 29.32 N-m-s and not 22.6 N-m-s.

**Clarification #4**: The minimum time requirement has to be intended loosely. Any design of the control system attaining the required attitude in a reasonable time is acceptable.

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** **** **

***** Challenge MSS 2014 - Results**

- Mario Tindaro Migliorino - 2 pt.

- Michela Archi - 1 pt.

- Renato Volpe - 1 pt.

- Filippo Silvestrucci - 1 pt.

- Andrea Antolino - 1 pt.

Congratulations to all participants. The solution will be presented on Monday May 19, 1:30 pm, at the Radio Science Lab.

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**- Tuesday May 13, 8:30-10:00 am, room 39**

**- Wednesday May 13, 12:00-1:30 pm, room 39**

**- Thursday May 13, 10:15-11:45 am, room ********* 39 **********

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**Challenge MSS 2014 ****WARNING (May 9, h.19:30) : The first guess value of the GM must be set to 401500 km3/s2 and not to 398500 km3/s2 as reported in the text of the challenge. ******

**Observables: t****rack_GS1.txt t****rack_GS2.txt**

**Email the code and the report to luciano.iess@uniroma1.it AND paolo.racioppa@uniroma1.it by Sunday May 11 23:59:59 UTC.**

Students who did not pass the first test can take part in the challenge. The challenge is valid as a backup test. The deadline is unchanged (no extension this time).

** **

**Home Test 1 (revised) (students passing both tests are eligible to take the final exam in a simplified mode)**

**Observable quantities (trackfile.txt) **

***** Email the code (Matlab, Fortran, C ...) and a short note containing the procedure, the solution and the plots to luciano.iess@uniroma1.it AND paolo.racioppa@uniroma1.it by midnight Sunday Apr. 27, 2014. **

***** Updated List of received reports by midnight Sunday Apr. 27, 2014 *****

List of Received Reports (Updated)

***** Home Test 1 Results *****

Students who did not pass the first test can take part in the challenge. The challenge is valid as a backup test.

** **

**** Follow the link on the side to know the dates of examination sessions.**

**** Dates of home tests and competition:**

** **- Apr. 23-27 (home test 1)

- May. 20-24 (home test 2)

- May 9-11 (competition)

** **

**** Space Environment and Instrumentation**: The updated class notes

- Space_Env_Instr_2014_1.pdf

- Space_Env_Instr_2014_2.pdf

- phase_amplitude.m (matlab file)

- quadrupole_eig.m (matlab file)

may be downloaded from the link Class Notes.

**** Space Missions and Systems**: The updated class notes

- Missioni_Sist_Spa_0_2014.pdf

- Missioni_Sist_Spa_1_2014.pdf

- Missioni_Sist_Spa_2_2014.pdf (only minor typos corrected)

- Missioni_Sist_Spa_3_2014.pdf (some typos corrected)

may be downloaded from the link Class Notes. Please consider also the auxiliary slides Normal_Distributions.pdf.

**For updated information you may follow me on Twitter** (luciano_iess)

Seminar 1: Deep Space Navigation Systems: Where Do We Stand?

Seminar 2: The European Delta-DOR Correlator

Seminar 3: BepiColombo, the ESA Mission To Mercury; MORE: Geodesy, Geophysics, Navigation

Seminar 4 and 5: The Scientific Use of Deep Space Tracking Systems; Radio Science in Deep Space Missions

*****Tour of Robledo's DNS facilities.** The visit to the Robledo and Cebreros tracking complexes was an interesting and profitable experience for all of us. Follow the link to see some photos.

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Relativity in the Global positioning System by N. Ashby