Citation
Abstract
The closed-loop conical-scatt (conscan) rccltttique hasprwcu ;O bc a tlscjhl ttwthod fi)r pointing the atttetwus nwrc accttrare~v tltatt is possible b}. opcll-loop ttw?hoch. ASprcscttr(v implctttctttcd, the atmtwa bcatu isscawcd abow the rcccivcil stlwal Jitcc. tiotl by pl).vs!caltttorcntcnt of the atttctwu. It’hilt stralglttjisnnml, this approach has at least two disaA’atttagcs. First(v, became of stntcrwal distortiotts, jWtc attglc cncodcr rcsohttion, and drirc servo response, the actual atttcwa beam dircctlott OII(Vapproximates the cotwt?amlcd bcattt direction, Secondly. becauseof the largemassworcd dwi)tg scan. the rate of scuffisscvcrcly rcstrictcd, If there arcsigtlificauf gaitror si.cna!Icvcl variatiom dwing a scanperiod, the conscattsysrcnt rhtcrprcts thesevariations asat]tcwa poitttittg error. Both or thesedhadvatttagcs wott!d bc alkiarcd in al)incrtialess conscans.utcnt in which the bcaw scatttting wasperformed clcctrotu’tally. Rcccttt(v. staltdard JPL al;rctwa fccdltom software wasttpgradcd (described scparatc(v in this report) to cahtlatc, ankstui! orltcr things. asswwctric comtgatcd hortt radiatiott pattcrtts of the t.r”pethat wwld bc ttccdcd for electronic bcaw scan.A brief look hasbectl takctt or the required hotw c.vcit~ tiott. Therewlts, dcscribcd II?this article. archigh[v prowisittg.
Details
- Volume
- 42-51
- Published
- June 15, 1979
- Pages
- 85–93
- File Size
- 308.1 KB