<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 22:20:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 60% PACIFIC flags: 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" >
2026.03.16 (075) 22:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607503162220009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="6.250" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.893" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.080" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="350.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="350.000" 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="6.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="443.304" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="370.572" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="335.867" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.555" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="52.876" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.694" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="25.915" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.420" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.060" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 350.000 360.000 360.000 357.500 355.000 355.000 355.000 354.286 353.571 352.857 352.143 351.429 350.714 350.000 350.000 350.000 350.000 350.000 352.500 355.000 357.500 360.000 360.000 360.000 360.000 360.000 360.000 365.000 362.500 360.000 365.000 365.000 365.000 370.000 370.000 370.000 371.250 372.500 373.750 375.000 380.000 380.000 381.000 382.000 383.000 384.000 385.000 387.500 390.000 392.500 395.000 390.000 400.000 400.000 400.000 400.000 403.000 406.000 409.000 412.000 415.000 415.000 415.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 420.000 425.000 427.500 430.000 430.000 432.500 435.000 437.500 443.304
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 51 51 57 0 60 0 60 0 0 57 0 0 0 57 60 63 66 66 66 57 54 60 63 0 69 66 60 51 0 63 66 0 63 57 51 60 0 69 51 72 72 72 0 0 0 0 66 57 69 0 72 66 72 69 78 75 0 0 60 0 63 69 66 57 66 63 57 66 72 69 72 69 72 75 66 63 0 69 66 63
</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 -1.171875 -0.390625 -0.390625 2.734375 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 1.171875 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 0.390625 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 141.822 145.0 150.0 155.0 160.0 165.0 170.0 173.644 175.0 180.0 185.0 190.0 195.0 200.0 205.0 205.466 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 370.572 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.326 0.303 0.27 0.222 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.231 0.255 0.279 0.303 0.328 0.352 0.354 0.442 0.535 0.629 0.725 0.824 0.927 1.035 1.147 1.265 1.387 1.515 1.649 1.789 1.935 2.089 2.249 2.417 2.594 2.779 2.973 3.177 3.392 3.617 3.856 4.107 4.372 4.652 4.946 5.253 5.568 5.873 6.127 6.249 6.25 6.233 6.175 6.083 5.962 5.816 5.651 5.471 5.28 5.081 4.878 4.673 4.467 4.263 4.062 3.865 3.674 3.488 3.308 3.135 2.969 2.81 2.657 2.512 2.374 2.242 2.117 1.998 1.885 1.778 1.677 1.581 1.491 1.405 1.325 1.248 1.176 1.108 1.044 0.984 0.927 0.873 0.822 0.774 0.729 0.687 0.647 0.609 0.573 0.54 0.508 0.479 0.451 0.424 0.4 0.376 0.354 0.334 0.314 0.296 0.278 0.262 0.247 0.232 0.219 0.206

</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="6.25" PeakHeight="370.572" Num="5" zHalfNm="335.867" Error="2.776">
-136.767 -47.027 21.483 -3.17 0.375
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="95.466" Depth="0.154"/>
<TopsideChapman PeakHeight="370.572" PeakDensity="484646.4" PeakScaleHeight="25.915" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
