<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-03 -062 23:20:00.000"
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 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" >
2026.03.03 (062) 23:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606203032320009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="6.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.773" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.164" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.500" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="445.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="445.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="6.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="467.142" 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="2.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="424.985" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="397.998" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.856" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="43.975" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.499" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="21.097" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="75.320" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.000" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="82">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.3 6.35 6.4 6.45 6.5 6.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
450.000 450.000 450.000 450.000 445.000 445.714 446.429 447.143 447.857 448.571 449.286 450.000 450.714 451.429 452.143 452.857 453.571 454.286 455.000 455.714 456.429 457.143 457.857 458.571 459.286 460.000 460.000 457.500 455.000 450.000 452.500 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 455.000 450.000 450.000 450.500 451.000 451.500 452.000 452.500 453.000 453.500 454.000 454.500 455.000 457.500 460.000 462.653 467.142 476.382 506.395
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 54 57 57 0 0 54 0 0 0 0 0 0 0 60 54 0 0 57 0 0 57 0 0 51 51 0 51 51 0 48 0 57 0 0 0 60 0 0 48 0 54 0 54 0 0 0 0 0 54 0 54 0 0 0 0 0 57 0 0 0 0 57 60 57 60 57 57 57 0 57 0 0 0 48 48 51 0 48 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 -0.390625 -0.390625 -1.171875 0.390625 1.171875 -0.390625 -0.390625 0.390625 -0.390625 1.171875 -0.390625 -0.390625 -1.171875 0.390625 1.953125 0.390625 1.171875 -1.171875 1.171875 1.953125 1.171875 0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 -0.390625 0.390625 -1.171875 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 1.953125 1.171875 1.953125 0.390625 0.390625 1.171875 1.171875 1.953125 0.390625 2.734375 0.390625 1.171875 1.171875 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 2.734375 -0.390625 -0.390625 0.390625 2.734375 -0.390625 -0.390625 -2.734375
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="125">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 144.501 145.0 150.0 155.0 160.0 165.0 170.0 175.0 179.003 180.0 185.0 190.0 195.0 200.0 205.0 210.0 213.504 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 424.985 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.344 0.33 0.311 0.284 0.246 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.204 0.227 0.249 0.271 0.294 0.316 0.338 0.354 0.365 0.414 0.484 0.576 0.674 0.77 0.861 0.948 1.032 1.115 1.197 1.279 1.362 1.445 1.529 1.614 1.701 1.791 1.882 1.976 2.073 2.173 2.277 2.385 2.497 2.614 2.736 2.864 3.0 3.142 3.294 3.455 3.627 3.813 4.013 4.233 4.474 4.743 5.047 5.395 5.799 6.255 6.55 6.55 6.516 6.42 6.275 6.09 5.875 5.637 5.385 5.124 4.859 4.595 4.334 4.08 3.833 3.595 3.367 3.15 2.944 2.749 2.565 2.392 2.229 2.076 1.933 1.799 1.674 1.557 1.448 1.347 1.252 1.164 1.081 1.005 0.934 0.868 0.806 0.749 0.695 0.646 0.6 0.557 0.518 0.481 0.447 0.415 0.385 0.358 0.332 0.308 0.286 0.266 0.247 0.229 0.213

</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="6.55" PeakHeight="424.985" Num="5" zHalfNm="397.998" Error="6.961">
-155.85 -88.047 37.801 -0.573 -4.812
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="103.504" Depth="0.154"/>
<TopsideChapman PeakHeight="424.985" PeakDensity="532289.06" PeakScaleHeight="21.097" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
