<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 04:30:00.000"
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 2 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Severe F-spread, 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" >
2026.03.29 (088) 04:30:00</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">
FF202608803290430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.856" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="11.854" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="4.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="380.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="380.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="3.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="411.381" 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="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="361.446" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="311.295" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="4.772" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="72.484" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="3.429" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.510" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="73.810" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.920" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
380.000 380.000 380.000 382.500 385.000 387.500 390.000 392.500 394.306 396.449 399.031 402.205 406.200 411.381 418.368 428.306 443.565 469.978 526.826
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 57 63 57 0 57 0 54 57 57 0 60 0 0 0 57 48 0 0
</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 1.953125 -0.390625 -0.390625 -1.171875 0.390625 -0.390625 0.390625 2.734375 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="144">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 147.303 150.0 155.0 160.0 165.0 170.0 175.0 180.0 184.605 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 221.908 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 361.446 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.345 0.334 0.318 0.295 0.265 0.224 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.222 0.243 0.264 0.284 0.305 0.325 0.346 0.354 0.396 0.468 0.548 0.638 0.738 0.851 0.975 1.111 1.259 1.417 1.584 1.758 1.939 2.124 2.313 2.504 2.696 2.886 3.073 3.255 3.429 3.592 3.741 3.873 3.983 4.067 4.123 4.149 4.15 4.146 4.13 4.101 4.061 4.012 3.953 3.887 3.815 3.737 3.654 3.568 3.479 3.388 3.295 3.201 3.107 3.012 2.918 2.825 2.733 2.641 2.552 2.464 2.378 2.293 2.211 2.131 2.053 1.977 1.903 1.831 1.762 1.695 1.63 1.567 1.507 1.448 1.392 1.337 1.285 1.234 1.185 1.139 1.093 1.05 1.008 0.968 0.929 0.892 0.856 0.822 0.788 0.757 0.726 0.697 0.669 0.642 0.616 0.591 0.567 0.544 0.522 0.501 0.48 0.461 0.442 0.424 0.407 0.39 0.374 0.359 0.345 0.331 0.317 0.304 0.292 0.28 0.269 0.258 0.247 0.237 0.227 0.218 0.209 0.201

</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="4.15" PeakHeight="361.446" Num="5" zHalfNm="311.295" Error="1.395">
-136.169 -5.406 2.936 -1.415 0.516
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="111.908" Depth="0.154"/>
<TopsideChapman PeakHeight="361.446" PeakDensity="213678.66" PeakScaleHeight="37.51" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
