How the VIrtual Observatory helped building the ALMA Science Archive

The Atacama Large Millimeter Array (ALMA) radio interferometer has started Early Science observations, providing a copious stream of new, high-quality astronomical datasets of unpreceden- ted sensitivity and resolution. In this talk we will present how existing Virtual Observatory (VO) technologies and software packages, together with Web 2.0 techniques, were leveraged to provide scientists with the ALMA Science Archive (ASA): an easy to use, multi-parameter discovery tool for ALMA data, ultimately integrated with the VO. We will also show the advantages of this ap- proach, which allowed for faster software development, and a decoupling of the ALMA Front-end Archive (AFA), and the ASA.

Presented in the Instrumentation & Computing sessions of the X Scientific Meeting of the Spanish Astronomical Society (SEA), on July 9th, 2012.

Transcript

1. How the VO helped building the ALMA Science Archive Juan de Dios Santander Vela (ESO, SDD-ALMA) Felix Stoehr (ESO, ALMA Archive Scientist) X Reunión Científica de la SEA Valencia, 9 de Julio de 2012
2. How the VO helped building the ALMA Science Archive Juan de Dios Santander Vela (IAA-CSIC) Felix Stoehr (ESO, ALMA Archive Scientist) X Reunión Científica de la SEA Valencia, 9 de Julio de 2012
3. Talk Outline Who am I The problem: Archiving & accessing ALMA data The solution: ALMA Science Archive The enabler: VO Technologies Implementing the ASA Conclusions & Future work
4. Who am I Member of the AMIGA international collaboration, based at IAA-CSIC Ph.D. on bringing Radio Astronomical data archives and tools into the VO Applied Scientist at ESO VLT archive, Software Engineer/Astronomy Specialist at ALMA archive (May 2009-Dec 2011) Back to IAA-CSIC as VIA-SKA Project Manager EXPERIENCE ON (RADIO)ASTRONOMICAL DATA, METADATA, VIRTUAL OBSERVATORY, ASTRONOMICAL OBSERVATIONS, ARCHIVES, AND THE ALMA SCIENCE DATA MODEL GROUP INTEREST IN TECH DEVELOPMENTS FOR BETTER SCIENCE
5. Archiving & Accessing ALMA Data THE PROBLEM
6. Archiving & Accessing ALMA Data
7. Archiving & Accessing ALMA Data Right now (ALMA Cycle 1) More than 32 antennas (12m) in Chajnantor More than 9 antennas (7m) in ACA Baselines 160m to 1km (more than 500 baselines) Receivers for 4-bands (3,4,6,9), 8-10-12 GHz bandwidths
8. Archiving & Accessing ALMA Data When finished… More than 50 antennas (12m) in Chajnantor 12 antennas (7m) in ACA Around 1300 baselines, up to 18 km Receivers for 10-bands (30-950 GHz), 8-12 GHz bandwidth, SSB/DSB LARGE AMOUNT OF DATA AND METADATA TO BE STORED IN ORDER TO BE LATER PROCESSED
9. Archiving & Accessing ALMA Data Large amounts of entities, data, timestamps to be stored, with high data rate ALMA Science Data Model (Viallefond, Caillat, others) ➡ Science Data Model (ALMA, EVLA…) XML Database implementation of CASA MS ALMA Project Data Model Projects, PIs, Science Goals…
10. calat_water error asdmt able asdm almaradio meter almar_spectral windowid annot ation annot_antenna id annot_vvd values annot_vvll value antenna anten_ offset anten_ position beam calampli calam_aperture efficiency calam_aperture efficiencyer calam_frequency range calam_polarization types calatmos phere calat_forward effspectrum calat_frequency range calat_frequency spectrum calat_powerload spectrum calat_powersky spectrum calat_ tatm calat_tatm spectrum calat_ tau calat_tau spectrum calat_ trec calat_trec spectrum calat_ tsys calat_tsys spectrum calat_ water calat_alpha spectrum calat_forward efficiency calat_forward efficiencyerr calat_ sbgain calat_sbgain error calat_sbgain spectrum calband pass calba_anten nanames calba_c urve calba_fre qlimits calba_polarization types calba_reduced chisquared calba_ rms calcurve calcu_antenna names calcu_ curve calcu_frequency range calcu_polariz ationtypes calcu_reduced chisquared calcu _rms cald ata calda_scanset calda_field name calda_scan intent calda_source code calda_source name cal delay calde_del ayerror calde_delay offset calde_polarization types calde_reduced chisquared calde_ref freq calde_reffreq phase calde_side bands caldevice calde_ caleff calde_noise cal calde_temperature load cal flux calfl_ flux calfl_flux error calfl_frequency ranges calfl_ stokes calfl_dir ection calfl _pa calfl_pa error calfl_size source calfl_size error calfocus model calfo_coeff error calfo_coeff fixed calfo_coeff formula calfo_coeff name calfo_coeff value calfo_focus rms cal focus calfo_frequency range calfo_ offset calfo_offset error calfo_offset wastied calfo_pointing direction calfo_polariz ationtypes calfo_reduced chisquared calfo_were fixed calfo_focuscurve wasfixed calfo_focus curvewidth calfo_focus curvewidtherror calfo_off intensity calfo_off intensityerror calfo_peak intensity calfo_peak intensityerror cal gain calholography calho_ direction calho_focus position calho_freque ncyrange calho_grav optrange calho_screw motion calho_screw motionerror calho_screw name calho_temp optrange calphase calph_ ampli calph_antenna names calph_baseline lengths calph_decorr elationfactor calph_dir ection calph_frequen cyrange calph_ phase calph_phase rms calph_polarization types calph_stat phaserms calph_correcti onvalidity calpointing model calpo_ coefferror calpo_ coefffixed calpo_coeff name calpo_ coeffval calpo_coeff formula calpoi nting calpo_co llerror calpo_colloffs etabsolute calpo_colloffs etrelative calpo_collo ffsettied calpo_di rection calpo_freque ncyrange calpo_polariz ationtypes calpo_reduced chisquared calpo_be ampa calpo_bea mpaerror calpo_bea mwidth calpo_beam widtherror calpo_beamwid thwasfixed calpo_offi ntensity calpo_offinte nsityerror calpo_peak intensity calpo_peakint ensityerror calpos ition calpo_antenn aposition calpo_pos itionerr calpo_posit ionoffset calpo_refante nnanames calpo_statio nposition calprimar ybeam calpr_freque ncyrange calpr_mainbea mefficiency calred uction calre_appliedc alibrations calre_par amset calse eing calse_baselin elengths calse_freque ncyrange calse_pha serms cal wv r calwv_ch anfreq calwv_ch anwidth calwv_d rypath calwv_inputant ennanames calwv_pa thcoeff calwv_poly freqlimits calwv_r eftemp calwv_ water calwv_ wetpath configdes cription confi_ant ennaid confi_datades criptionid confi_f eedid confi_switc hcycleid confi_assocconf igdescripti confi_atmphas ecorrection confi_phase darraylist correlato rmode corre_axesor derarray corre_baseba ndconfig corre_baseba ndnames corre_filt ermode datadesc ription delay model delay_atm drydelay delay_atm wetdelay delay_clo ckdelay delay_geo mdelay delay_dis pdelay delay_gro updelay delay_pha sedelay dop pler ephe meris execb lock execb_ant ennaid fee d feed_rec eiverid feed_be amid feed_bea moffset feed_focusr eference feed_polre sponse feed_recept orangle feed_illu moffset feed_po sition fiel d field_d elaydir field_ph asedir field_refer encedir flagc md focus model focus_coeff formula focus_coe ffname focus_co effval foc us focus_foc usoffset focus_measuredf ocuspositio freqo ffset gaintra cking gaint_cabl edelay gaint_lopropa gationdelay gaint_recei verdelay gaint_a ttfreq gaint_atts pectrum gaint_fre qoffset gaint_pha seoffset hist ory hologr aphy ma in main_s tateid observ ation pointin gmodel point_coe ffname point_c oeffval point_coeff formula poin ting point_e ncoder point_ offset point_pointi ngdirection point_t arget point_sampledt imeinterval point_sour ceoffset polari zation polar_corr product proce ssor recei ver recei_f reqlo recei_side bandlo sbsum mary sbsum_cente rdirection sbsum_obser vingmode sbsum_scie ncegoal sbsum_weathe rconstraint scan scan_cald atatype scan_calibrat iononline scan_sca nintent scan_calibr ationset scan_fiel dname seeing seein_base length seein_pha serms source sourc_di rection sourc_prop ermotion sourc _flux sourc_f luxerr sourc_fre quency sourc_frequen cyinterval sourc_p osition sourc_posit ionangle sourc_positio nangleerr sourc_ra ngevel sourc_restfr equency sourc_size source sourc_si zeerr sourc_stokesp arameter sourc_s ysvel sourc_tr ansition spectral window spect_assocspect ralwindowi spect_asso cnature spect_chanf reqarray spect_chanw idtharray spect_effectiv ebwarray spect_lin earray spect_resolu tionarray squarelawdetector state stat ion stati_position sub scan subsc_numbersub integration switch cycle switc_diroffset array switc_freqoffset array switc_stepduration array switc_weight array sys cal sysca_phasediff spectrum sysca_tant spectrum sysca_tanttsys spectrum sysca_tcal spectrum sysca_trx spectrum sysca_tsky spectrum sysca_tsys spectrum total power total_ stateid total_expo sure total_flag ant total_flag pol total_float data total_time centroid total_ uvw weather wvmcal wvmca_p athcoeff wvmca_poly freqlimits wvmca_r eftemp THE ALMA SCIENCE DATA MODEL, EXPLODED
11. c calfocus model calfo_coeff error calfo_coeff fixed calfo_coeff formula calfo_coeff name calfo_coeff value calfo_focus rms cal focus calfo_frequency range calfo_ offset calfo_offset error calfo_offset wastied calfo_pointing direction calfo_polariz ationtypes calfo_reduced chisquared calfo_were fixed calfo_focuscurve wasfixed calfo_focus curvewidth calfo_focus curvewidtherror calfo_off intensity calfo_off intensityerror calfo_peak intensity calfo_peak intensityerror cal gain calholography calho_ direction calho_focus position calho_freque ncyrange calho_grav optrange calho_screw motion calho_screw motionerror calho_screw name calho_temp optrange calphase calph_ ampli calph_antenna names calph_baseline lengths calph_decorr elationfactor calph_dir ection calph_frequen cyrange calph_ phase calph_phase rms calph_polarization types calph_stat phaserms calph_correcti onvalidity calpointing model calpo_ coefferror calpo_ coefffixed calpo_coeff name calpo_ coeffval calpo_coeff formula calpo_co llerror calpo_colloffs etabsolute calpo_colloffs etrelative calpo_collo ffsettied
12. calat_water error calatmos phere calat_forward effspectrum calat_frequency range calat_frequency spectrum calat_powerload spectrum calat_powersky spectrum calat_ tatm calat_tatm spectrum calat_ tau calat_tau spectrum calat_ trec calat_trec spectrum calat_ tsys calat_tsys spectrum calat_ water calat_alpha spectrum calat_forward efficiency calat_forward efficiencyerr calat_ sbgain calat_sbgain error calat_sbgain spectrum calband pass calba_anten nanames calba_c urve calba_fre qlimits calba_polarization types calba_reduced chisquared calba_ rms calcurve calcu_antenna names calcu_ curve calcu_frequency range calcu_polariz ationtypes calcu_reduced chisquared calcu _rms cald ata calda_scanset calda_field name calda_scan intent calda_source code calda_source name cal delay calde_del ayerror calde_delay offset calde_polarization types calde_reduced chisquared calde_ref freq calde_reffreq phase calde_side bands caldevice calde_ caleff cal calde_temperature load calfl_flux error ranges
13. scan scan_cald atatype scan_calibr ationset scan_fiel dname seeing seein_base length seein_pha serms source sourc_di rection sourc_prop ermotion sourc _flux sourc_f luxerr sourc_fre quency sourc_frequen cyinterval sourc_p osition sourc_posit ionangle sourc_positio nangleerr sourc_ra ngevel sourc_restfr equency sourc_size source sourc_si zeerr sourc_stokesp arameter sourc_s ysvel sourc_tr ansition spectral window spect_assocspect ralwindowi spect_asso cnature spect_chanf reqarray spect_chanw idtharray spect_effectiv ebwarray spect_lin earray spect_resolu tionarray squarelawdetector state stat ion stati_position sub scan subsc_numbersub integration switch cycle switc_diroffset array switc_freqoffset array switc_stepduration array switc_weight array sysca_tant spectrum sysca_tanttsys spectrum
14. feed_rec eiverid eed_recept orangle feed_illu moffset feed_po sition fiel d field_d elaydir field_ph asedir field_refer encedir flagc md focus model focus_coeff formula focus_coe ffname focus_co effval foc us focus_foc usoffset focus_measuredf ocuspositio freqo ffset gaintra cking gaint_cabl edelay gaint_lopropa gationdelay gaint_recei verdelay gaint_a ttfreq gaint_atts pectrum gaint_fre qoffset gaint_pha seoffset hist ory hologr aphy ma in main_s tateid observ ation pointin gmodel point_coe ffname point_c oeffval point_coeff formula poin ting point_e ncoder point_ offset point_pointi ngdirection point_t arget point_sampledt imeinterval point_sour ceoffset po zat pola pro
15. calred uction calre_par amset calse eing calse_baselin elengths calse_freque ncyrange calse_pha serms cal wv r calwv_ch anfreq calwv_ch anwidth calwv_d rypath calwv_inputant ennanames calwv_pa thcoeff calwv_poly freqlimits calwv_r eftemp calwv_ water calwv_ wetpath configdes cription confi_ant ennaid confi_datades criptionid confi_f eedid confi_switc hcycleid confi_assocconf igdescripti confi_atmphas ecorrection confi_phase darraylist correlato rmode corre_axesor derarray corre_baseba ndconfig corre_baseba ndnames corre_filt ermode
16. c calfocus model calfo_coeff error calfo_coeff fixed calfo_coeff formula calfo_coeff name calfo_coeff value calfo_focus rms cal focus calfo_frequency range calfo_ offset calfo_offset error calfo_offset wastied calfo_pointing direction calfo_polariz ationtypes calfo_reduced chisquared calfo_were fixed calfo_focuscurve wasfixed calfo_focus curvewidth calfo_focus curvewidtherror calfo_off intensity calfo_off intensityerror calfo_peak intensity calfo_peak intensityerror cal gain calholography calho_ direction calho_focus position calho_freque ncyrange calho_grav optrange calho_screw motion calho_screw motionerror calho_screw name calho_temp optrange calphase calph_ ampli calph_antenna names calph_baseline lengths calph_decorr elationfactor calph_dir ection calph_frequen cyrange calph_ phase calph_phase rms calph_polarization types calph_stat phaserms calph_correcti onvalidity calpointing model calpo_ coefferror calpo_ coefffixed calpo_coeff name calpo_ coeffval calpo_coeff formula calpo_co llerror calpo_colloffs etabsolute calpo_colloffs etrelative calpo_collo ffsettied
17. calat_water error asdmt able asdm almaradio meter almar_spectral windowid annot ation annot_antenna id annot_vvd values annot_vvll value antenna anten_ offset anten_ position beam calampli calam_aperture efficiency calam_aperture efficiencyer calam_frequency range calam_polarization types calatmos phere calat_forward effspectrum calat_frequency range calat_frequency spectrum calat_powerload spectrum calat_powersky spectrum calat_ tatm calat_tatm spectrum calat_ tau calat_tau spectrum calat_ trec calat_trec spectrum calat_ tsys calat_tsys spectrum calat_ water calat_alpha spectrum calat_forward efficiency calat_forward efficiencyerr calat_ sbgain calat_sbgain error calat_sbgain spectrum calband pass calba_anten nanames calba_c urve calba_fre qlimits calba_polarization types calba_reduced chisquared calba_ rms calcurve calcu_antenna names calcu_ curve calcu_frequency range calcu_polariz ationtypes calcu_reduced chisquared calcu _rms cald ata calda_scanset calda_field name calda_scan intent calda_source code calda_source name cal delay calde_del ayerror calde_delay offset calde_polarization types calde_reduced chisquared calde_ref freq calde_reffreq phase calde_side bands caldevice calde_ caleff calde_noise cal calde_temperature load cal flux calfl_ flux calfl_flux error calfl_frequency ranges calfl_ stokes calfl_dir ection calfl _pa calfl_pa error calfl_size source calfl_size error calfocus model calfo_coeff error calfo_coeff fixed calfo_coeff formula calfo_coeff name calfo_coeff value calfo_focus rms cal focus calfo_frequency range calfo_ offset calfo_offset error calfo_offset wastied calfo_pointing direction calfo_polariz ationtypes calfo_reduced chisquared calfo_were fixed calfo_focuscurve wasfixed calfo_focus curvewidth calfo_focus curvewidtherror calfo_off intensity calfo_off intensityerror calfo_peak intensity calfo_peak intensityerror cal gain calholography calho_ direction calho_focus position calho_freque ncyrange calho_grav optrange calho_screw motion calho_screw motionerror calho_screw name calho_temp optrange calphase calph_ ampli calph_antenna names calph_baseline lengths calph_decorr elationfactor calph_dir ection calph_frequen cyrange calph_ phase calph_phase rms calph_polarization types calph_stat phaserms calph_correcti onvalidity calpointing model calpo_ coefferror calpo_ coefffixed calpo_coeff name calpo_ coeffval calpo_coeff formula calpoi nting calpo_co llerror calpo_colloffs etabsolute calpo_colloffs etrelative calpo_collo ffsettied calpo_di rection calpo_freque ncyrange calpo_polariz ationtypes calpo_reduced chisquared calpo_be ampa calpo_bea mpaerror calpo_bea mwidth calpo_beam widtherror calpo_beamwid thwasfixed calpo_offi ntensity calpo_offinte nsityerror calpo_peak intensity calpo_peakint ensityerror calpos ition calpo_antenn aposition calpo_pos itionerr calpo_posit ionoffset calpo_refante nnanames calpo_statio nposition calprimar ybeam calpr_freque ncyrange calpr_mainbea mefficiency calred uction calre_appliedc alibrations calre_par amset calse eing calse_baselin elengths calse_freque ncyrange calse_pha serms cal wv r calwv_ch anfreq calwv_ch anwidth calwv_d rypath calwv_inputant ennanames calwv_pa thcoeff calwv_poly freqlimits calwv_r eftemp calwv_ water calwv_ wetpath configdes cription confi_ant ennaid confi_datades criptionid confi_f eedid confi_switc hcycleid confi_assocconf igdescripti confi_atmphas ecorrection confi_phase darraylist correlato rmode corre_axesor derarray corre_baseba ndconfig corre_baseba ndnames corre_filt ermode datadesc ription delay model delay_atm drydelay delay_atm wetdelay delay_clo ckdelay delay_geo mdelay delay_dis pdelay delay_gro updelay delay_pha sedelay dop pler ephe meris execb lock execb_ant ennaid fee d feed_rec eiverid feed_be amid feed_bea moffset feed_focusr eference feed_polre sponse feed_recept orangle feed_illu moffset feed_po sition fiel d field_d elaydir field_ph asedir field_refer encedir flagc md focus model focus_coeff formula focus_coe ffname focus_co effval foc us focus_foc usoffset focus_measuredf ocuspositio freqo ffset gaintra cking gaint_cabl edelay gaint_lopropa gationdelay gaint_recei verdelay gaint_a ttfreq gaint_atts pectrum gaint_fre qoffset gaint_pha seoffset hist ory hologr aphy ma in main_s tateid observ ation pointin gmodel point_coe ffname point_c oeffval point_coeff formula poin ting point_e ncoder point_ offset point_pointi ngdirection point_t arget point_sampledt imeinterval point_sour ceoffset polari zation polar_corr product proce ssor recei ver recei_f reqlo recei_side bandlo sbsum mary sbsum_cente rdirection sbsum_obser vingmode sbsum_scie ncegoal sbsum_weathe rconstraint scan scan_cald atatype scan_calibrat iononline scan_sca nintent scan_calibr ationset scan_fiel dname seeing seein_base length seein_pha serms source sourc_di rection sourc_prop ermotion sourc _flux sourc_f luxerr sourc_fre quency sourc_frequen cyinterval sourc_p osition sourc_posit ionangle sourc_positio nangleerr sourc_ra ngevel sourc_restfr equency sourc_size source sourc_si zeerr sourc_stokesp arameter sourc_s ysvel sourc_tr ansition spectral window spect_assocspect ralwindowi spect_asso cnature spect_chanf reqarray spect_chanw idtharray spect_effectiv ebwarray spect_lin earray spect_resolu tionarray squarelawdetector state stat ion stati_position sub scan subsc_numbersub integration switch cycle switc_diroffset array switc_freqoffset array switc_stepduration array switc_weight array sys cal sysca_phasediff spectrum sysca_tant spectrum sysca_tanttsys spectrum sysca_tcal spectrum sysca_trx spectrum sysca_tsky spectrum sysca_tsys spectrum total power total_ stateid total_expo sure total_flag ant total_flag pol total_float data total_time centroid total_ uvw weather wvmcal wvmca_p athcoeff wvmca_poly freqlimits wvmca_r eftemp MORE THAN 360 ASDM TABLES & SUBTABLES!
18. Archiving & Accessing ALMA Data ASDM, APDM are CASA-friendly, not astronomer/ science friendly ALMA Frontend Archive, optimized for storage & preservation, not for data query/retrieval We need an ALMA Science Archive, at least for when there are science data to be released We cannot build it on top of the ASDM directly
19. ALMA Science Archive THE SOLUTION
20. ALMA Science Archive
21. ALMA Science Archive AFA DB ASA DB harvesting ASA IF queries
22. ALMA Science Archive AFA DB ASA DB harvesting ASA IF queries No changes to AFA DB Harvesting takes selected datasets from AFA DB into ASA DB ASA DB consists of scientific relevant parameters ASA IF supports the different clients: engineers, scientists, and the VO
23. ASA Elements: Harvester Lightweight process. Current ALMA holdings can be reprocessed in less than 4 hours Ensures only correct data enters the ASA Performs tasks such as: ASDM parsing & consolidation ASDM consistency checks coordinate conversion solar system body identification baseline reprojection harvesting
24. ASA Elements: ASA DB Plain relational SQL DB Based on Hubble Legacy Archive experience Denormalized Structure Science Project SpectralWindows Provenance Supports pipeline reduced and externally reduced visibilities & data products Allows joint querying of all product types ASA DB INSPIRED BY IVOA OBSCORE DATA MODEL, ASDM
25. ASA Elements: Interfaces ASA Interfaces built as web application VO metadata-driven Clients supported: QA/CSV: technical parameters (scheduling blocks, scan intents) Scientists: science parameters Resolution (spatial, frequency & velocity) Positional and target searches Programatic/VO interface GUI and API (for VO and tooling) ASA IF
26. VO Technologies for the ALMA Archive THE ENABLER
27. VO Technologies for the ALMA Archive Virtual Observatory: federation of archives sharing a set of common practices and data models that allow for easy discoverability of interoperable data- sets, with unified description by means of a common data model, within the realm of astronomy. Data model: Description of the set of entities needed for information storage in a particular field, specifying both the data being stored, and the relationships between them. NEED OF SOFTWARE TO IMPLEMENT IT
28. VO Technologies for the ALMA Archive VO Data Models ASA DB structure inspired from ObsCore, RADAMS, Hubble Legacy Archive VO Software openCADC (DB access, VO access protocols, metadata management) VOView (VOTable rendering web component) MAXIMISATION OF SOFTWARE REUSE, MAXIMISATION OF OUTPUT PER DEVELOPER 㽉
29. ASA Implementation THE RESULT
30. ASDM Harvester RDBMS ASA Tables openCADC Tomcat Web App VO API VOView ASA Implementation VO ENABLED!
31. ASDM Harvester RDBMS ASA Tables openCADC Tomcat Web App VO API VOView ASA Implementation JUST NEED TO WRITE THESE AND CONNECTORS!
32. Demo
34. Conclusions & Future Work The separation of the ASA & AFA allows for different parameter spaces to be queried (instrumental vs. scientific) on the ALMA archive Using IVOA standards for metadata allows us to use VO solutions to implement a science archive And reduce the manpower to implement it! VO software is mature enough to implement a science archive around it AND YOU GET VO COMPATIBILITY FOR FREE!
35. Conclusions & Future Work Interface being simplified, even more VO metadata driven Expected to go public by the end of 2012, when the first reduced project data end their proprietary periods
36. Conclusions & Future Work Home -> Archive query -> Science query Science Query Search Reset Position Source name (Sesame) Source name (ALMA) RA Dec Search radius 00:10:00 Energy Band Frequency Bandwidth Spectral resolution Channels Time Observation date Integration time Polarization Polarization type Observation Project code Water vapor Scan intent Scheduling Block name Pad/Antenna name Query Form Result Table Get Data FUTURE INTERFACE MOCKUP
37. Gràcies! ¡Gracias! Thanks!
38. Questions?