Datasets of ionospheric parameters provided by SCINDA GNSS receiver from Lisbon airport area

Da a in B ie 31 (2020) 105966 Con en s lis s a ailable a ScienceDi ec Da a in B ie jou nal homepage: www.else ie .com/loca e/dib Da a A icle Da ase s o ionosphe ic pa ame e s p o ided by SCINDA GNSS ecei e om Lisbon ai po a ea Ta iana Ba lyae a ∗, Te esa Ba a a , Anna Mo ozo a Cen e o Ea h and Space Resea ch o he Uni e si y o Coimb a, Uni e si y o Coimb a, Almas de F ei e, S a. Cla a, 3040-004 Coimb a, Po ugal a i c l e i n o A icle his o y: Recei ed 27 Ap il 2020 Re ised 17 June 2020 Accep ed 29 June 2020 A ailable online 3 July 2020 Keywo ds: SCINDA GNSS ecei e Raw da a Recei e posi ioning Ionosphe e scin illa ions TEC SCINDA ionosphe e da a analysis "SCINDA-Iono" oolbox a b s a c He e we p esen da ase s p o ided by a SCINDA GNSS e- cei e ins alled in he Lisbon ai po a ea om No embe o 2014 o July o 2019. The ins alled equipmen is a No A el EURO4 wi h a JAVAD Choke-Ring an enna. The da a a e in an a chi ed o ma and include he gene al messages on qual- i y o eco ds ( ∗.msg), RANGE files ( ∗. ng), aw obse ables as he signal- o-noise (S/N) a ios, pseudo anges and phases ( ∗.obs), ecei e posi ion in o ma ion ( ∗.psn), ionosphe e scin- illa ions moni o (ISMRB; ∗.ism) and ionosphe ic pa ame- e s: o al elec on con en (TEC), a e o change o TEC in- dex (ROTI), and he scin illa ion index S4 ( ∗.scn). The p e- sen ed da a co e he ull 2015 yea . The aw da a a e o 1- min esolu ion and a ailable o each o he ecei e -sa elli e pai s. The p ocessing and he analysis o he ionosphe e scin- illa ion da ase s can be done using a specific "SCINDA-Iono" oolbox o he MATLAB de eloped by T. Ba lyae a in 2019 and a ailable online ia Ma hWo ks File Exchange sys em. The oolbox calcula es 1-h means o ionosphe ic pa ame e s o each o he a ailable ecei e -sa elli e pai s and a e aged o e all a ailable sa elli es du ing he analyzed hou . He e we p esen he p ocessed da a o he ollowing mon hs in 2015: Ma ch, June, Oc obe , and Decembe . The mon hs we e se- lec ed as con aining mos significan geomagne ic e en s o 2015. The 1-h means o o he mon hs can be ob ained om he aw da a using he a o emen ioned oolbox. The p o ided ∗Co esponding au ho . E-mail add ess: ba lyae [email p o ec ed] (T. Ba lyae a). h ps://doi.o g/10.1016/j.dib.2020.105966 2352-3409/© 2020 The Au ho (s). Published by Else ie Inc. This is an open access a icle unde he CC BY license. ( h p://c ea i ecommons.o g/licenses/by/4.0/ ) 2 T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 da ase s a e in e es ing o he GNSS and ionosphe e based scien ific communi ies. ©2020 The Au ho (s). Published by Else ie Inc. This is an open access a icle unde he CC BY license. ( h p://c ea i ecommons.o g/licenses/by/4.0/ ) Specifica ions Table Subjec Signal P ocessing Specific subjec a ea The da ase s p o ided by GNSS ecei e s, in pa icula ionosphe e scin illa ion da a. Type o da a ASCII, ex messages and bina y Table How da a we e acqui ed The da a ha e been eco ded by a GNSS ecei e ins alled in Lisbon ai po a ea. Ins umen s: he ins alled equipmen is a No A el EURO4 wi h a JAVAD Choke-Ring an enna and a fi mwa e (SCINDA) ins alled. SCINDA (Scin illa ion Ne wo k Decision Aid) is a sys em designed o speci y ionosphe ic scin illa ion in eal ime and was de eloped by he US Ai Fo ces. Da a o ma Raw P ocessed Pa ame e s o da a collec ion The da a we e acqui ed con inuously a 1 Hz and s o ed in a compu e and ex e nal disks. In he Lisbon ai po he elec ic powe and limi ed access o people we e ensu ed in o de o main ain he quali y and in eg i y o da a. The equipmen was no connec ed o he in e ne . Sys em main enance ope a ions we e pe o med pe iodically so ha he e was no in e up ion o da a collec ion. No calib a ion o he ins alled ecei e was done. Desc ip ion o da a collec ion Da a p esen ed he e we e collec ed om Janua y o Decembe o 2015.The da a we e acqui ed con inuously a 1 Hz. The fi mwa e SCINDA gi e a file as ou pu wi h calcula ed ecei e posi ion along wi h ime- ag and he numbe o sa elli es in iew, including sa elli e iden ifie numbe (PRN) o he acked ones. The acqui ed TEC da a a e wi hou co ec ion o he ecei e bias. Da a sou ce loca ion Ins i u ion: Lisbon ai po a ea Ci y/Town/Region: Lisbon Coun y: Po ugal La i ude and longi ude (and GPS coo dina es) o collec ed samples/da a: La i ude (deg ees): 38.77932527 Longi ude (deg ees): −9.139699966 Al i ude (ellipsoidal, m): 128.139 Da a accessibili y Reposi o y name: Mendeley Da a Da a iden ifica ion numbe : 10.17632/kky n5d8yc.1 Di ec URL o da a: h ps://da a.mendeley.com/da ase s/kky n5d8yc/1 Value o he Da a • He e we p o ide complemen a y da a se allowing o es ima e ionosphe ic condi ions and GNSS posi ioning quali y in 2015 o he mid-la i udinal egion a he wes coas o he Ibe ian Peninsula (a ea o he Lisbon ai po ). • The da a se con ains bo h he aw and p ocessed da a om a GNSS ecei e . The p ocessing includes, e.g., gaps and bad da a emo al, a e aging o e 1-h ime in e al, bo h o indi idual ecei e -sa elli e pai s and o e all a ailable pai s. We also p o ide a ool o p ocess and analyze he aw da a: he "SCINDA-Iono" oolbox o he MATLAB, which is publicly a ailable. • These da a can be used o he analysis o space wea he e ec s on he GNSS signal quali y and es ima ions o co ec ions o be used in upcoming GNSS se ices/sys ems accoun ing o he space wea he condi ions. Also, his da a can be used o an analysis o ionosphe e condi ions obse ed in 2015. • GNSS is widely used now in nume ous applica ions o oads, ailways, ma i ime, ag icul- u e and ai na iga ion, so he imp o emen s o (i.e.) posi ion in o ma ion p o ided by GNSS se ices can se e o he sa e y o li e. T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 3 • The e a e a leas wo main communi ies who can di ec ly benefi om hese da a: he com- muni ies o ionosphe e sciences and o he GNSS echnologies and se ices. • Some scien ific esul s o he ionosphe e condi ions analysis du ing ew significan geomag- ne ic s o ms in 2015 can be ound in [1] . 1. Da a Desc ip ion He e we p esen he da a o he ull 2015 yea p o ided by a SCINDA GNSS ecei e in- s alled in Lisbon ai po a ea om No embe o 2014 o July o 2019. The ins alled equipmen is a No A el EURO4 wi h a JAVAD Choke-Ring an enna, wi h he fi mwa e Scin illa ion Ne wo k Decision Aid (SCINDA). The de ails o he SCINDA so wa e unc ionali ies can be ound in [2–8] . The aw da a (sub olde "DATA-RAW ") include he gene al messages on he quali y o eco ds ( ∗.msg), RANGE files ( ∗. ng), aw obse ables as S/N a ios, pseudo anges and phases ( ∗.obs), ecei e posi ion in o ma ion ( ∗.psn), ionosphe e scin illa ions moni o ( ∗.ism) and ionosphe e scin illa ions ( ∗.scn) as TEC (To al Elec on Con en ), S4 (Scin illa ion index) and ROTI (Ra e o - TEC Index). The olde s wi h aw da a a e o ganized as ollows (see Fig. 1 ). The olde o he yea wi h he name in he o ma "YYYY " (2015) con ains sub olde s en i led "MM-Mon " ha include se s o gz-a chi ed files wi h he names in o ma "YYMMDD_HH0 0 0 0" (whe e ’0 0 0 0’ is he su - fix ha co esponds o he hou 0 0:0 0) and ex ensions ".ism", ".msg", ". ng", ".obs", ".psn" and ".scn". The ".msg" files con ain ex messages on he ecei e diagnos ics and eco ds’ quali y, he ".ism" files keep al e na i e ionosphe e moni o s a is ics (ISMRB) eco ds w i en in e ba- im om he ecei e wi hou using SCINDA so wa e, and he ". ng" files a e RANGE eco ds. The ".obs", ".psn" and ".scn" files con ain da a in he ASCII o ma . Each o he la e da a files co e s 1-h in e al and consis s o he da a o 1-min esolu ion o all isible sa elli es. Each da a sequence in hese files s a s om he epoch in o ma ion (da e and ime) and ollowed by he da a. The ".obs" files p esen aw eco ds on he S/N a ios, pseudo anges and phases o bo h he L1 and L2 channels. The ".psn" files con ain la i ude, longi ude and al i ude ollowed by he used sa elli es in o ma ion. The ".scn" files epo he de ailed ionosphe e condi ions’ in o ma- ion (see o ".scn" eco ds sec ion on he p ocessed ".scn" da a in he "Expe imen al Design, Ma e ials, and Me hods" wi h Fig. 8 ). In addi ion o he aw da a, kep in he a chi ed o ma , we p esen he p ocessed scin il- la ion ( ∗.scn) da ase s o selec ed mon hs o 2015: Ma ch, June, Oc obe and Decembe , he mon hs wi h mos significan geomagne ic e en s o 2015. These da a can be ound in he sub olde "DATA-PROCESSED ". One should no e ha in heo y SCINDA so wa e is able o do sepa a ion o he ionosphe e and plasmasphe e TEC [3] , bu o he p esen ed da a his op ion was deac i a ed. The p ocessed scin illa ion da a a e o ganized in he ollowing way (see Fig. 2 ). Fo example, he da a in he olde s "All_T20_61p_TwD_2015–03 " and "SATs_T20_61p_TwD_2015–03 " a e he Fig. 1. O ganiza ion o he aw da a in sub olde s o he olde "2015 ". 4 T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 Fig. 2. O ganiza ion o he p ocessed da a in co esponding olde s. Fig. 3. O ganiza ion o he p ocessed da a files: 1-min da a o a e ages o e all isible sa elli es. Fig. 4. O ganiza ion o he p ocessed da a files: 1-min da a o each ecei e -sa elli e pai . Fig. 5. O ganiza ion o he p ocessed da a files: 1-h means o a e ages o e all isible sa elli es. Ma ch 2015 (see “2015–03") da a p ocessed o elimina e h ee ypes o e o s ha can be ound in he aw da a files, which we named as "T20", "61p" and "TwD" e o s. The meaning and de- ails o hese ypes o e oneous o missed blocks a e explained below in "Expe imen al Design, Ma e ials, and Me hods" sec ion, "So wa e unc ionali ies" subsec ion. The ’T20_61p_TwD’ la- bels in he olde s’ names mean ha he p ocessed da a a e ee om e o s o all h ee ypes. These olde s con ain ei he da a a e aged o e all isible sa elli es da a (’All’ case) o he da a o each o ecei e -sa elli e pai s sepa a ely (’SATs’ case). Fo he case o he sepa a e ecei e - sa elli e pai s he lis o he isible sa elli es is p o ided in a dedica ed file. Each olde con ains pai s o files: he da a file and he file wi h ime s amps (1-min esolu ion). The sub olde s "All_T20_61p_TwD_Means1h_2015–03 " and "SATs_T20_61p_TwD_SATs1h_2015– 03 " con ain he 1-h means o he a e ages o e all a ailable sa elli es and o each o he ecei e -sa elli e pai s, espec i ely. Each 1-h means file also con ains he s anda d de ia ion and he numbe o success ul obse a ions. The lis o isible sa elli es is also a ailable in a sepa a e file. Figs. 3 –6 illus a e how he p ocessed da a a e o ganized in files. Examples o he da a files o 1-min esolu ion a e in Figs. 3 and 4 o he ’All’ and ’SATs’ cases, espec i ely. Simila da a o he 1-h esolu ion a e in Figs. 5 and 6 . T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 5 Fig. 6. O ganiza ion o he p ocessed da a files: 1-h da a o each ecei e -sa elli e pai . Fig. 7. "SCINDA-Iono" oolbox a chi ec u e. The files wi h he p ocessed da a con ain six columns ha co espond, espec i ely om he 1s o he 6 h, o ’L1S4  , ’L2S4  , ’TECP’, ’TECF’, ’ROTI’, ’TECR’ alues which a e he scin illa ion in ensi y index S4 o L1 and L2 bands, di e en ial pseudo ange TEC (in TEC Uni s, TECU), di - e en ial ca ie phase TEC (in TECU), ROTI ( a e o change o TEC o e one minu e), ela i e and no -calib a ed TEC (in TECU), espec i ely. The files wi h da es/ imes con ain six columns ha co espond ( om he 1s o he 6 h), o he yea , mon h, day, hou , seconds om he s a o day, and ime in pa s o a day, espec i ely. The uploaded da a a e accompanied by a sho README file. 6 T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 Fig. 8. Example o an o iginal scin illa ion ( ∗.scn) da a file. Fig. 9. Example o a scin illa ion ( ∗.scn) da a file o one ecei e -sa elli e pai . 2. Expe imen al design, ma e ials, and me hods To p ocess and analyze he aw ionosphe ic da a we ecommend o use he "SCINDA-Iono" oolbox o he MATLAB specifically de eloped o his pu pose. This oolbox a ailable online ia he Ma hWo ks FileExchange sys em and can be downloaded a h ps://www.ma hwo ks.com/ ma labcen al/fileexchange/71784- scinda- iono _ oolbox . T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 7 Fig. 10. Example o 1-min esolu ion plo s o an a e age o e all a ailable sa elli es. The e a e o he packages de eloped o analyze GNSS scin illa ion da a p o ided by a ious ecei e s including SCINDA fi mwa e, bu some o hem a e p op ie a y, a leas pa ly (e.g., GAMIT/GLOBIK/TRACK, h p://www-gpsg.mi .edu/ ∼simon/g gk/ , GAMIT is de eloped o Unix only), some a e de eloped in o he languages (e.g., GPSTk Pos -p ocessing, www.gps k.com , in C ++ ), and some a e o ien ed mos ly o posi ion e o and p o ec ion le el calcula ion (e.g., RTK- LIB, h p://www. klib.com/ ). Some packages (e.g., "GPS-TEC" [6] ) being de eloped o o he en- i onmen can be un also in he MATLAB bu do di e en kind o da a p ocessing and analysis compa ing o ou package. The ad an age o he "SCINDA-Iono" oolbox compa ing o o he packages o he analysis o he GNSS scin illa ion da a om he SCINDA ecei e s is ha i is ee and publicly a ailable, de eloped specifically o he MATLAB, can be un unde Windows sys em, and is o ien ed o he gene al scin illa ion da a p ep ocessing, p ocessing and analysis. The oolbox is designed o analyze he da a in he ime in e al chosen inside one calenda mon h. 2.1. So wa e a chi ec u e The a chi ec u e o he "SCINDA-Iono" oolbox is schema ically p esen ed in Fig. 7 . I can be o mally di ided in o h ee p incipal blocks: - an adap a ion o he ecei e p o ided scin illa ion da a o he u he analysis; - hei p ep ocessing; - analysis. 8 T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 Fig. 11. Example o 1-h esolu ion plo s o an a e age o e all a ailable sa elli es. The p ep ocessing includes he co ec ions o he da a o he ecei e ’s miscalcula ions and he in e nal clock ailu es. The e a e h ee ypes o he p ep ocessing p ocedu es (see Fig. 1 ). 2.2. So wa e unc ionali ies The "SCINDA-Iono" oolbox allows o pe o m ollowing ope a ions: - To unzip he scin illa ion da a. Since he o iginal da a a e p o ided in he a chi ed o ma , o be p ocessed hey should be unzipped. - To c ea e he da a files o each o he ecei e -sa elli e pai s , ha ha e he o ma simila o one o he o iginal scin illa ion da a files. - To dele e epochs wi h e oneous alues (so-called ’T20’ p ep ocessing). Some epochs s a , as no mally, by he le e ’T’ and ollowed by ’ −20  (ins ead o a wo-digi yea numbe ). E en i he con en o such epochs seems o con ain ue obse a ions we p e e o dele e such epochs wi h e oneous heade s. - To combine all da a o a specific hou om di e en files o a single file (so-called ’61p’ p e- p ocessing). Some hou ly files o 1-min da a con ain one measu emen om he ’neighbo ’ hou , hus he 61 h measu emen appea s. Such ‘ex a’ measu emen s a e mo ed o he co esponding hou file. - To dele e he epochs wi hou da a, ha con ains only i les (so-called ’ TwD’ p ep ocessing). Some blocks a e emp y and con ain no da a excep he heade . - To analyze he 1-min esolu ion da a. As a esul , he g aphs o all p ep ocessed da a wi h 1-min ime esolu ion a e plo ed. T. Ba lyae a, T. Ba a a and A. Mo ozo a / Da a in B ie 31 (2020) 105966 9 Fig. 12. Example o s anda d de ia ion plo s o 1-h means calcula ed o e an a e age o e all a ailable sa elli es. - To analyze 1-h esolu ion da a. He e he 1-h means a e calcula ed accompanied by he s an- da d de ia ion (S d) and a numbe o success ul obse a ions (Numb. o Poin s). I should be no ed ha 1) he da a ob ained on each s ep lis ed abo e a e sa ed in o indi- ca ed olde s and 2) each o he s eps lis ed abo e can be included o excluded by use upon decision. In he la e case, one mus pay a en ion o he names o he files o be used o u he s eps. 2.3. Illus a i e examples He e we p esen an example o he da a obse ed du ing he mos significan geomagne ic s o m o he 24 h sola cycle ha ook place on 17–18 o Ma ch, 2015. The o iginal scin illa ion da a ( ∗.scn) a e o he o ma p esen ed in Fig. 8 . This da a file is an inpu file o he "SCINDA- Iono" oolbox. Files o his ype con ain bo h sa elli e cha ac e is ics and ionosphe ic pa ame e s. Each file consis s o alues egis e ed by a ious sa elli es, and each line o he file con ains da a ob- ained by one ecei e -sa elli e pai . Each epoch s a s om he le e ’T’ and con ains yea (YY, wo digi s), mon h (MM, wo digi s), day (DD, wo digi s), ime (UTSEC, in seconds since mid- nigh ). The da a o each epoch con ains he azimu h o a sa elli e (AZ, in deg ees), ele a ion o a sa elli e (EL, in deg ees), scin illa ion in ensi y index S4 on he L1 and L2 bands (L1S4 and L2S4, espec i ely), pe cen o he samples aken compa ed o numbe expec ed (%SAM, be ween 0 and 100%), di e en ial pseudo ange (TECP, in TECU), di e en ial ca ie phase (TECF, in TECU), ela i e no -calib a ed TEC (TECR, in TECU), a e o change o TEC o e one minu e (ROTI), ime