<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 19:50:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="18.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.03.27 (086) 19:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202608603271950009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.582" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.667" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="465.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="2.315" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="379.450" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="284.813" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.702" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.461" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="60.318" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="70.359" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="143.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.730" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="193">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 245.000 245.000 250.000 255.000 255.000 255.000 250.000 251.667 253.333 255.000 256.667 258.333 260.000 265.000 265.000 265.000 265.000 267.500 270.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 291.429 292.857 294.286 295.714 297.143 298.571 300.000 300.000 300.000 305.000 305.000 305.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 321.250 322.500 323.750 325.000 326.250 327.500 328.750 330.000 330.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 385.000 386.000 387.000 388.000 389.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 407.500 410.000 405.000 410.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 430.000 430.000 425.000 427.500 430.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 473.750 477.500 481.250 485.000 491.250 497.500 503.750 510.000 510.000 515.000 520.000 530.000 535.000 544.435 555.107 567.277 581.284 597.579 616.771 639.708
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 54 57 0 63 63 63 63 66 66 63 63 63 0 0 57 48 0 0 0 57 0 60 63 0 66 63 0 66 57 0 0 66 66 60 63 0 0 60 63 63 63 0 63 66 66 0 0 0 57 0 48 69 72 69 69 69 69 66 66 69 66 66 63 66 69 69 63 63 66 69 0 48 0 0 0 0 0 69 69 69 72 60 0 69 72 63 0 69 72 63 0 69 72 66 0 72 63 66 72 57 63 69 51 72 66 69 69 72 72 69 51 0 69 69 72 72 72 72 69 72 69 0 0 0 0 72 72 69 69 72 69 69 66 66 69 69 63 0 48 66 57 0 63 51 60 60 0 0 0 60 57 54 48 54 57 0 57 48 54 57 54 42 51 45 54 57 54 51 57 51 54 0 54 0 54 0 0 0 45 57 54 51 57 54 54 54 51 0 0 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.68 90.0 95.0 100.0 105.0 110.0 115.0 116.523 120.0 123.045 125.0 129.568 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 379.45 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.227 1.553 2.005 2.24 2.315 2.241 2.188 2.188 2.188 2.226 2.315 2.325 2.446 2.569 2.696 2.828 2.964 3.106 3.255 3.41 3.573 3.743 3.922 4.109 4.306 4.511 4.725 4.948 5.18 5.42 5.667 5.921 6.181 6.447 6.717 6.992 7.269 7.548 7.829 8.111 8.393 8.675 8.955 9.234 9.511 9.785 10.055 10.321 10.581 10.834 11.079 11.315 11.539 11.75 11.946 12.122 12.278 12.41 12.516 12.592 12.637 12.65 12.65 12.642 12.623 12.592 12.551 12.5 12.439 12.369 12.29 12.204 12.11 12.009 11.902 11.789 11.671 11.548 11.421 11.289 11.154 11.015 10.874 10.73 10.584 10.436 10.287 10.136 9.984 9.832 9.679 9.525 9.372 9.218 9.065 8.913 8.761 8.609 8.459 8.309 8.161 8.013 7.867 7.723 7.58 7.438 7.298 7.16 7.023 6.888 6.755 6.623 6.494 6.366 6.24 6.116 5.994 5.874 5.756 5.64 5.525 5.413 5.302 5.194 5.087 4.982 4.879 4.778 4.679 4.581 4.485 4.392 4.299 4.209 4.12 4.033 3.948 3.865 3.783 3.702 3.624 3.546 3.471 3.397 3.324 3.253 3.183 3.115 3.048 2.982 2.918 2.855 2.794 2.734 2.674 2.617 2.56 2.505 2.45 2.397 2.345 2.295 2.245 2.196 2.148 2.102 2.056 2.011 1.967 1.925 1.883 1.842 1.802 1.762 1.724 1.686 1.649 1.613 1.578 1.544 1.51 1.477 1.445 1.413 1.382 1.352 1.322

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.315" PeakHeight="110.0" Num="3" Error="0.0">
-29.499 11.708 -2.529
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.315" EndFrequency="12.65" PeakHeight="379.45" Num="5" zHalfNm="284.813" Error="3.789">
-221.93 -31.001 5.148 -3.446 1.347
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="19.568" Depth="0.127"/>
<TopsideChapman PeakHeight="379.45" PeakDensity="1985390.9" PeakScaleHeight="70.359" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
