<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-02 -061 00:50:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2o cusp not found, 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" >
2026.03.02 (061) 00:50:00</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">
FF202606103020050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.818" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.561" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="305.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="305.000" 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="1.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="431.388" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="366.883" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="309.074" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.126" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="83.248" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="13.185" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="43.492" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="77.410" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.590" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="89">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
305.000 305.000 305.000 305.000 306.250 307.500 308.750 310.000 315.000 315.000 315.000 315.000 315.000 315.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 325.000 332.500 340.000 342.500 345.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 355.000 355.000 355.000 355.000 360.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 375.000 380.000 385.000 390.000 393.333 396.667 400.000 402.500 405.000 407.500 410.000 408.000 406.000 404.000 402.000 400.000 410.000 420.000 421.588 423.436 425.614 428.218 431.388 435.330 440.364 447.020 456.229 469.809 491.845 533.798
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 0 63 0 0 0 57 57 60 57 0 63 60 54 0 54 57 0 0 69 66 66 0 0 60 63 57 0 0 48 0 0 0 54 51 0 66 0 66 60 0 66 66 66 60 0 63 60 72 66 60 69 72 0 69 66 69 60 0 60 60 54 0 0 57 0 57 51 60 0 60 60 57 60 66 57 54 57 57 0 0 0 0 0 0 0 54 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 1.953125 -0.390625 -1.171875 -1.953125 -2.734375 -0.390625 1.171875 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.953125 -1.171875 -1.171875 -1.953125 -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 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.953125 -2.734375 -0.390625 -1.953125 -1.953125 -0.390625 -2.734375 -0.390625 1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="175">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 146.624 150.0 155.0 160.0 165.0 170.0 175.0 180.0 183.247 185.0 190.0 195.0 200.0 205.0 210.0 215.0 219.871 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.883 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0
</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 0.316 0.293 0.261 0.218 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.207 0.228 0.249 0.27 0.291 0.312 0.334 0.354 0.356 0.452 0.555 0.671 0.806 0.965 1.153 1.376 1.638 1.941 2.283 2.658 3.058 3.472 3.892 4.308 4.715 5.105 5.476 5.825 6.147 6.442 6.707 6.942 7.144 7.314 7.449 7.55 7.617 7.647 7.65 7.646 7.625 7.586 7.532 7.463 7.381 7.287 7.183 7.07 6.949 6.821 6.687 6.549 6.407 6.262 6.115 5.966 5.816 5.666 5.516 5.367 5.218 5.071 4.926 4.782 4.641 4.501 4.365 4.231 4.1 3.971 3.846 3.724 3.604 3.488 3.374 3.264 3.157 3.052 2.951 2.853 2.757 2.665 2.575 2.488 2.403 2.321 2.242 2.166 2.091 2.019 1.95 1.883 1.818 1.755 1.694 1.635 1.579 1.524 1.471 1.42 1.37 1.322 1.276 1.231 1.188 1.147 1.107 1.068 1.031 0.994 0.959 0.926 0.893 0.862 0.832 0.802 0.774 0.747 0.721 0.695 0.671 0.647 0.625 0.603 0.581 0.561 0.541 0.522 0.504 0.486 0.469 0.452 0.436 0.421 0.406 0.392 0.378 0.365 0.352 0.339 0.327 0.316 0.305 0.294 0.284 0.274 0.264 0.255 0.246 0.237 0.229 0.221 0.213 0.205

</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="7.65" PeakHeight="366.883" Num="5" zHalfNm="309.074" Error="2.268">
-158.297 16.34 -6.851 1.32 0.476
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="109.871" Depth="0.154"/>
<TopsideChapman PeakHeight="366.883" PeakDensity="726085.6" PeakScaleHeight="43.492" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
