<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-25 -084 06:10:00.000"
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, 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) 06:10:00</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">
FF202608403250610009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="4.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.943" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="14.423" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="5.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="285.000" 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="4.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="375.342" 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="2.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="346.043" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="281.302" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="2.690" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="91.441" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="6.071" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.924" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="75.060" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="4.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 285.000 285.000 285.000 290.000 290.000 292.500 295.000 295.000 295.000 296.667 298.333 300.000 303.333 306.667 310.000 312.500 315.000 320.000 325.000 330.000 332.500 335.000 335.000 335.000 335.000 345.000 347.323 349.918 352.836 356.142 359.918 364.272 369.348 375.342 382.527 391.298 402.244 416.291 434.971 461.033 499.924 564.217
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
78 0 0 72 66 72 0 0 78 0 72 0 0 75 0 72 81 66 78 75 69 57 0 66 57 63 66 69 72 72 69 75 72 69 63 60 0 0 51 0 63 0 60 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 -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 -1.953125 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="174">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 145.783 150.0 155.0 160.0 165.0 170.0 175.0 180.0 181.567 185.0 190.0 195.0 200.0 205.0 210.0 215.0 217.35 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 346.043 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.352 0.344 0.332 0.314 0.289 0.256 0.209 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.215 0.236 0.258 0.279 0.301 0.322 0.344 0.354 0.397 0.492 0.602 0.726 0.866 1.026 1.214 1.442 1.73 2.097 2.54 2.991 3.377 3.687 3.936 4.139 4.305 4.443 4.557 4.651 4.728 4.79 4.837 4.87 4.891 4.9 4.9 4.897 4.885 4.865 4.837 4.801 4.759 4.711 4.657 4.598 4.535 4.468 4.398 4.325 4.249 4.171 4.092 4.011 3.928 3.845 3.762 3.678 3.594 3.511 3.428 3.345 3.263 3.181 3.101 3.021 2.943 2.866 2.79 2.715 2.641 2.569 2.499 2.43 2.362 2.296 2.231 2.168 2.106 2.045 1.987 1.929 1.873 1.819 1.765 1.714 1.663 1.614 1.566 1.52 1.475 1.431 1.388 1.347 1.306 1.267 1.229 1.192 1.156 1.121 1.087 1.054 1.022 0.991 0.961 0.932 0.904 0.876 0.849 0.823 0.798 0.774 0.75 0.727 0.705 0.684 0.663 0.642 0.623 0.604 0.585 0.567 0.55 0.533 0.517 0.501 0.485 0.47 0.456 0.442 0.428 0.415 0.403 0.39 0.378 0.367 0.355 0.344 0.334 0.323 0.314 0.304 0.295 0.285 0.277 0.268 0.26 0.252 0.244 0.237 0.229 0.222 0.215 0.209 0.202

</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="4.9" PeakHeight="346.043" Num="5" zHalfNm="281.302" Error="2.479">
-153.912 41.156 -23.517 9.632 -2.052
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="107.35" Depth="0.154"/>
<TopsideChapman PeakHeight="346.043" PeakDensity="297890.8" PeakScaleHeight="49.924" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
