<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-21 -294 15:00:00.000"
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 1 0 0 0 0 0 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% PACIFIC flags: F2x cusp not found, Multiple candidates for F2o 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" >
2026.10.21 (294) 15:00:00</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">
FF202629410211500009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="6.801" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.273" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.369" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.912" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="7.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="6.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="340.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.001" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.393" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.362" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="230.911" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="186.455" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="158.654" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.844" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="35.337" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="72.775" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="11.064" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.136" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="98.980" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.020" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.480" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="31">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
330.000 325.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 332.500 335.000 336.667 338.333 340.000 340.000 340.000 340.000 340.000 350.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 51 54 57 54 51 54 51 51 60 60 63 63 63 63 66 63 60 60 57 0 57 0 0 60 0 60 60 51 60
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.95 5.0 5.05 5.1 5.15 5.2 5.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 290.000 290.000 300.000 315.000 330.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 51 51 51 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="146">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.483 90.0 95.0 100.0 105.0 110.0 111.538 113.075 114.613 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 186.455 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 230.911 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.283 2.936 3.282 3.393 3.27 3.27 3.393 3.408 3.604 3.799 3.991 4.172 4.334 4.479 4.609 4.728 4.838 4.941 5.04 5.132 5.216 5.269 5.273 5.386 5.535 5.686 5.848 6.023 6.206 6.39 6.573 6.772 6.801 6.795 6.773 6.735 6.683 6.619 6.542 6.456 6.36 6.257 6.147 6.031 5.91 5.785 5.656 5.526 5.393 5.259 5.125 4.99 4.856 4.722 4.59 4.459 4.329 4.201 4.075 3.951 3.83 3.711 3.594 3.48 3.369 3.261 3.155 3.052 2.952 2.854 2.759 2.667 2.578 2.491 2.406 2.325 2.246 2.169 2.095 2.023 1.953 1.886 1.82 1.757 1.696 1.637 1.58 1.525 1.472 1.42 1.37 1.322 1.276 1.231 1.188 1.146 1.106 1.067 1.029 0.993 0.958 0.924 0.891 0.86 0.829 0.8 0.772 0.744 0.718 0.693 0.668 0.644 0.621 0.599 0.578 0.558 0.538 0.519 0.5 0.483 0.465 0.449 0.433 0.418 0.403 0.388 0.375 0.361 0.348 0.336 0.324 0.313 0.302 0.291 0.28 0.27 0.261 0.252 0.243 0.234 0.226 0.218 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.393" PeakHeight="110.0" Num="3" Error="0.0">
-30.502 13.154 -3.169
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.393" EndFrequency="5.273" PeakHeight="186.455" Num="5" Error="0.0">
-63.011 -14.265 7.964 -3.177 0.647
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.273" EndFrequency="6.801" PeakHeight="230.911" Num="5" zHalfNm="158.654" Error="1.29">
-28.487 -18.305 2.985 -1.186 0.537
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.613" Depth="0.123"/>
<TopsideChapman PeakHeight="230.911" PeakDensity="573866.0" PeakScaleHeight="43.136" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
