<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 21:40:00.000"
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 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2o cusp, One of F2 cusps was derived from the other</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" >
2026.02.03 (034) 21:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202603402032140009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.285" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="21.820" 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="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.350" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="625.000" 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="0.652" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.650" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.650" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="452.656" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="362.030" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.031" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="132.402" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.042" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="65.715" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.790" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="142">
<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 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 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 322.500 320.000 320.000 321.250 322.500 323.750 325.000 326.000 327.000 328.000 329.000 330.000 332.143 334.286 336.429 338.571 340.714 342.857 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 345.000 346.667 348.333 350.000 352.500 355.000 355.000 355.000 360.000 365.000 365.000 365.000 365.000 365.000 365.000 365.000 370.000 370.000 371.250 372.500 373.750 375.000 375.000 380.000 380.000 380.000 390.000 385.000 385.000 388.750 392.500 396.250 400.000 395.000 400.000 405.000 406.667 408.333 410.000 405.000 407.143 409.286 411.429 413.571 415.714 417.857 420.000 422.143 424.286 426.429 428.571 430.714 432.857 435.000 437.143 439.286 441.429 443.571 445.714 450.476 455.238 460.000 462.500 465.000 465.000 470.000 470.000 475.000 480.000 482.500 485.000 487.500 490.000 490.000 495.000 500.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 525.000 530.000 530.000 530.000 535.000 540.000 550.000 550.000 555.000 555.000 560.000 565.000 565.000 575.000 575.000 580.000 580.000 590.000 595.000 600.000 600.000 610.000 615.000 620.000 620.000 625.000 635.000 640.000 649.306 660.274
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 0 60 51 0 0 0 60 0 0 63 0 63 0 0 66 0 0 0 57 0 0 0 63 63 54 63 0 0 0 60 0 66 60 63 0 51 0 0 63 63 0 0 63 66 0 51 0 0 0 63 60 0 51 66 0 0 0 0 48 57 0 48 0 0 54 0 0 0 0 0 0 66 0 0 63 0 0 0 66 0 0 0 0 0 66 0 0 60 0 60 63 60 63 60 54 0 60 0 60 63 66 57 63 60 63 63 66 63 60 63 63 60 63 63 63 63 48 60 57 60 60 60 60 60 60 60 60 60 60 57 57 57 57 57 57 60 60 60 57 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.911 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 135.749 140.0 145.0 150.0 155.0 160.0 161.499 165.0 170.0 175.0 180.0 185.0 187.248 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 452.656 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.432 0.565 0.631 0.652 0.643 0.614 0.562 0.482 0.349 0.32 0.32 0.32 0.32 0.32 0.32 0.32 0.365 0.43 0.494 0.559 0.623 0.652 0.721 0.81 0.888 0.965 1.044 1.127 1.215 1.311 1.416 1.533 1.662 1.806 1.967 2.145 2.34 2.55 2.772 3.0 3.233 3.466 3.699 3.929 4.156 4.379 4.6 4.817 5.031 5.243 5.452 5.66 5.865 6.069 6.271 6.472 6.672 6.871 7.068 7.265 7.46 7.654 7.846 8.037 8.224 8.408 8.588 8.761 8.927 9.081 9.221 9.342 9.439 9.509 9.545 9.55 9.549 9.539 9.518 9.489 9.45 9.403 9.348 9.285 9.216 9.14 9.058 8.971 8.879 8.783 8.682 8.577 8.47 8.359 8.245 8.13 8.012 7.893 7.772 7.65 7.528 7.404 7.28 7.156 7.032 6.908 6.785 6.662 6.539 6.417 6.296 6.176 6.057 5.939 5.822 5.706 5.592 5.479 5.368 5.258 5.149 5.042 4.937 4.833 4.731 4.631 4.532 4.435 4.339 4.246 4.153 4.063 3.974 3.887 3.801 3.717 3.635 3.554 3.475 3.397 3.321 3.247 3.174 3.102 3.032 2.964 2.896 2.831 2.766 2.703 2.642 2.581 2.522 2.465 2.408 2.353 2.299 2.246 2.194 2.144 2.094 2.046 1.998 1.952 1.907 1.863 1.82 1.778 1.736 1.696 1.657 1.618 1.58 1.544 1.508 1.473 1.438 1.405 1.372 1.34 1.309 1.278 1.248 1.219 1.191 1.163

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.652" PeakHeight="110.0" Num="3" Error="0.0">
-24.218 5.802 -0.673
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.652" EndFrequency="9.55" PeakHeight="452.656" Num="5" zHalfNm="362.03" Error="7.327">
-254.828 -23.013 19.99 -15.178 7.621
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="77.248" Depth="0.332"/>
<TopsideChapman PeakHeight="452.656" PeakDensity="1131544.6" PeakScaleHeight="65.715" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
