<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 08:30:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, 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" >
2026.03.25 (084) 08:30:00</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">
FF202608403250830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="3.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.363" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="12.106" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.050" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="3.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" 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="3.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="306.201" 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="0.535" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="279.700" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="231.206" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.159" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="69.343" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="2.536" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.311" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="54.190" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="5.380" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="2.450" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 250.000 255.000 256.250 257.500 258.750 260.000 265.000 265.000 270.000 275.000 280.000 283.511 287.654 292.615 298.664 306.201 315.856 328.664 346.471 372.917 416.299
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 78 75 0 69 0 0 0 81 78 75 78 75 75 75 78 81 81 75 75 84 81 72 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="19">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 127.500 125.000 125.000 123.750 122.500 121.250 120.000 115.000 115.000 117.500 120.000 120.000 120.000 125.000 125.000 130.000 130.000 130.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 0 72 63 66 0 0 72 72 66 66 63 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 -0.390625 0.390625 -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="126">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
91.425 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 137.447 140.0 145.0 150.0 155.0 160.0 164.894 165.0 170.0 175.0 180.0 185.0 190.0 192.341 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 279.7 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.354 0.464 0.518 0.535 0.528 0.506 0.466 0.405 0.307 0.233 0.233 0.233 0.233 0.233 0.233 0.233 0.234 0.289 0.344 0.399 0.454 0.509 0.535 0.613 0.784 0.964 1.16 1.385 1.665 2.032 2.452 2.795 3.033 3.202 3.326 3.42 3.489 3.54 3.574 3.594 3.6 3.6 3.593 3.576 3.549 3.512 3.468 3.417 3.36 3.297 3.23 3.16 3.086 3.011 2.933 2.854 2.774 2.694 2.614 2.534 2.455 2.376 2.299 2.222 2.147 2.074 2.002 1.932 1.863 1.796 1.732 1.668 1.607 1.548 1.49 1.434 1.38 1.328 1.278 1.229 1.182 1.137 1.093 1.051 1.01 0.971 0.933 0.896 0.861 0.828 0.795 0.764 0.734 0.705 0.677 0.651 0.625 0.6 0.576 0.554 0.532 0.511 0.49 0.471 0.452 0.434 0.417 0.4 0.384 0.369 0.354 0.34 0.327 0.314 0.301 0.289 0.278 0.267 0.256 0.246 0.236 0.226 0.217 0.209 0.2

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.535" PeakHeight="110.0" Num="3" Error="0.0">
-22.84 4.73 -0.465
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.535" EndFrequency="3.6" PeakHeight="279.7" Num="5" zHalfNm="231.206" Error="1.354">
-105.897 29.177 -16.084 7.047 -1.602
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="82.341" Depth="0.302"/>
<TopsideChapman PeakHeight="279.7" PeakDensity="160794.05" PeakScaleHeight="38.311" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
