<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 22:10:00.000"
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="12.0">
<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 33 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.21 (294) 22:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629410212210009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.296" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.972" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="425.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="425.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="614.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="501.076" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="419.597" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.395" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="121.329" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.313" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="58.931" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="134.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.410" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="37">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
425.000 440.000 445.000 480.000 487.500 495.000 515.000 570.000 565.000 550.000 535.000 542.500 550.000 557.500 565.000 572.500 580.000 587.500 595.000 602.500 610.000 620.000 630.000 632.500 635.000 642.500 650.000 657.500 665.000 635.000 627.500 620.000 617.000 614.000 623.068 635.479 653.496
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 57 0 0 54 66 60 63 60 63 0 0 60 0 0 57 0 51 0 54 0 54 0 51 0 0 0 51 51 0 48 0 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.953125 -1.171875 -2.734375 -1.171875 -1.953125 -1.171875 -1.953125 -2.734375 -1.953125 -0.390625 -1.953125 -1.953125 0.390625 -1.171875 -0.390625 -1.953125 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 1.171875 0.390625 0.390625 -1.171875 -2.734375 0.390625 -1.171875 -0.390625 -0.390625 2.734375 1.171875 0.390625 -1.171875 -1.953125 -2.734375 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.486 145.0 150.0 155.0 160.0 165.0 170.0 174.972 175.0 180.0 185.0 190.0 195.0 200.0 205.0 207.458 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 501.076 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.305 0.273 0.229 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.224 0.248 0.271 0.295 0.319 0.342 0.354 0.4 0.452 0.496 0.539 0.581 0.625 0.67 0.718 0.768 0.822 0.879 0.94 1.005 1.075 1.149 1.228 1.311 1.397 1.488 1.581 1.677 1.776 1.876 1.977 2.08 2.183 2.287 2.391 2.496 2.601 2.706 2.812 2.918 3.024 3.131 3.238 3.345 3.454 3.562 3.672 3.782 3.893 4.004 4.117 4.23 4.345 4.46 4.576 4.693 4.811 4.929 5.046 5.163 5.276 5.384 5.482 5.564 5.623 5.649 5.65 5.648 5.638 5.621 5.597 5.567 5.531 5.49 5.443 5.392 5.337 5.278 5.215 5.149 5.081 5.01 4.936 4.861 4.785 4.706 4.627 4.547 4.466 4.385 4.303 4.221 4.14 4.058 3.976 3.895 3.815 3.735 3.656 3.577 3.499 3.422 3.346 3.272 3.198 3.125 3.053 2.983 2.913 2.845 2.778 2.712 2.647 2.584 2.522 2.461 2.401 2.343 2.285 2.229 2.174 2.121 2.068 2.017 1.966 1.917 1.869 1.822 1.776 1.732 1.688 1.645 1.603 1.563 1.523 1.484 1.446 1.409 1.373 1.338 1.304 1.27 1.238 1.206 1.175 1.145 1.115 1.086 1.058 1.031 1.004 0.978 0.953 0.928 0.904 0.881 0.858 0.836 0.814 0.793 0.772 0.752 0.733 0.714 0.695 0.677 0.659

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.65" PeakHeight="501.076" Num="5" zHalfNm="419.597" Error="13.141">
-262.132 -58.62 35.666 -16.234 7.702
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="97.458" Depth="0.154"/>
<TopsideChapman PeakHeight="501.076" PeakDensity="396060.78" PeakScaleHeight="58.931" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
