<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 05:50:00.000"
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 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Moderate F-spread, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Trace overlaps while constructing baseline</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) 05:50:00</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">
FF202608803290550009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="5.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.018" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="16.597" 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="6.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="391.880" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="328.242" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="276.823" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="3.149" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="73.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="5.995" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="38.625" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="64.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="3.250" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="61">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 265.000 265.000 267.500 270.000 275.000 280.000 280.000 283.750 287.500 291.250 295.000 295.000 295.000 300.000 300.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 301.667 303.333 305.000 305.000 307.500 310.000 315.000 320.000 322.857 325.714 328.571 331.429 334.286 337.143 340.000 340.000 340.000 340.000 365.000 370.000 370.000 380.000 382.500 385.000 380.000 382.930 386.736 391.880 399.217 410.531 430.254 473.314
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
75 0 0 66 0 0 0 0 72 66 0 0 0 60 0 66 0 63 0 57 0 66 75 72 78 72 69 78 69 0 0 69 69 69 75 0 72 63 72 69 66 0 66 0 66 69 72 63 57 66 57 48 57 54 60 0 0 60 0 63 57
</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 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 0.390625 0.390625 1.171875 0.390625 0.390625 1.171875 1.171875 1.171875
</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" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.167 150.0 155.0 160.0 165.0 170.0 175.0 180.0 182.333 185.0 190.0 195.0 200.0 205.0 210.0 215.0 218.5 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 328.242 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0
</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 0.333 0.315 0.291 0.258 0.213 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.211 0.233 0.254 0.275 0.297 0.318 0.339 0.354 0.395 0.509 0.629 0.772 0.958 1.213 1.568 2.025 2.518 2.982 3.398 3.766 4.091 4.376 4.626 4.843 5.027 5.18 5.303 5.397 5.46 5.494 5.5 5.499 5.484 5.453 5.408 5.35 5.28 5.2 5.112 5.015 4.913 4.805 4.692 4.577 4.459 4.339 4.218 4.096 3.975 3.854 3.734 3.615 3.498 3.382 3.269 3.158 3.049 2.943 2.839 2.738 2.64 2.545 2.452 2.362 2.275 2.19 2.109 2.03 1.953 1.879 1.808 1.739 1.673 1.608 1.547 1.487 1.43 1.374 1.321 1.27 1.22 1.173 1.127 1.083 1.041 1.0 0.961 0.923 0.887 0.852 0.818 0.786 0.755 0.726 0.697 0.67 0.643 0.618 0.593 0.57 0.547 0.526 0.505 0.485 0.466 0.447 0.43 0.413 0.396 0.381 0.366 0.351 0.337 0.324 0.311 0.299 0.287 0.276 0.265 0.254 0.244 0.234 0.225 0.216 0.208

</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="5.5" PeakHeight="328.242" Num="5" zHalfNm="276.823" Error="2.696">
-125.451 23.716 -10.534 1.426 1.101
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="108.5" Depth="0.154"/>
<TopsideChapman PeakHeight="328.242" PeakDensity="375310.2" PeakScaleHeight="38.625" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
