<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-03 -034 22:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: 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) 22:00:00</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">
FF202603402032200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.300" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.209" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="20.545" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.600" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" 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="8.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="630.000" 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="0.417" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="491.181" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="398.723" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.054" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="31.472" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.462" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="138.120" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.840" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="140">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 360.000 360.714 361.429 362.143 362.857 363.571 364.286 365.000 365.000 365.000 365.000 366.875 368.750 370.625 372.500 374.375 376.250 378.125 380.000 381.000 382.000 383.000 384.000 385.000 385.000 385.000 386.250 387.500 388.750 390.000 391.250 392.500 393.750 395.000 400.000 401.250 402.500 403.750 405.000 406.250 407.500 408.750 410.000 410.000 410.000 410.000 410.000 410.000 415.000 416.111 417.222 418.333 419.444 420.556 421.667 422.778 423.889 425.000 430.000 433.333 436.667 440.000 440.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 451.667 453.333 455.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 472.500 475.000 475.000 480.000 480.000 485.000 485.000 490.000 490.000 495.000 500.000 500.000 500.000 505.000 505.000 510.000 512.500 515.000 517.500 520.000 525.000 527.500 530.000 535.000 535.000 540.000 540.000 545.000 550.000 550.000 555.000 560.000 560.000 565.000 570.000 570.000 575.000 575.000 585.000 590.000 590.000 595.000 602.500 610.000 610.000 615.000 620.000 625.000 630.000 640.000 645.000 650.000 655.000 660.000 670.000 679.843 691.080 704.029
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 66 66 0 0 0 0 0 0 75 72 0 72 0 0 0 0 0 0 0 63 0 0 0 0 69 69 75 0 0 57 0 0 0 0 0 57 0 0 0 51 0 0 0 57 0 63 66 66 63 69 0 0 66 0 0 0 57 0 0 66 0 0 51 57 63 0 0 48 0 63 63 0 0 69 72 72 72 66 66 63 69 57 66 69 69 69 66 69 63 66 63 54 63 66 63 66 66 0 0 0 63 60 0 66 60 66 63 66 66 60 66 66 63 63 63 63 63 63 60 57 57 57 54 0 48 57 57 57 54 54 45 48 51 54 51 48 45 0 0
</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 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -1.953125 0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -0.390625
</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" >
92.446 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.072 140.0 145.0 150.0 155.0 160.0 165.0 168.144 170.0 175.0 180.0 185.0 190.0 195.0 197.216 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 491.181 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.276 0.361 0.404 0.417 0.412 0.398 0.372 0.333 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.251 0.288 0.326 0.363 0.4 0.417 0.464 0.53 0.59 0.649 0.71 0.773 0.84 0.912 0.988 1.071 1.161 1.259 1.365 1.48 1.604 1.738 1.881 2.034 2.196 2.366 2.542 2.725 2.914 3.106 3.303 3.502 3.704 3.908 4.113 4.32 4.528 4.737 4.947 5.157 5.367 5.578 5.789 6.0 6.21 6.42 6.629 6.837 7.044 7.248 7.45 7.648 7.842 8.031 8.213 8.388 8.554 8.708 8.849 8.974 9.083 9.171 9.238 9.281 9.299 9.3 9.297 9.285 9.265 9.235 9.198 9.153 9.102 9.043 8.979 8.908 8.833 8.752 8.667 8.577 8.484 8.388 8.288 8.185 8.08 7.973 7.864 7.754 7.641 7.528 7.414 7.299 7.184 7.068 6.952 6.836 6.72 6.605 6.489 6.375 6.261 6.148 6.035 5.924 5.813 5.703 5.595 5.488 5.382 5.277 5.174 5.072 4.971 4.871 4.774 4.677 4.582 4.489 4.397 4.306 4.217 4.129 4.043 3.959 3.875 3.794 3.714 3.635 3.558 3.482 3.407 3.334 3.263 3.192 3.124 3.056 2.99 2.925 2.861 2.799 2.738 2.678 2.62 2.562 2.506 2.451 2.397 2.344 2.293 2.242 2.192 2.144 2.097 2.05 2.005 1.96 1.917 1.874 1.832 1.792 1.752 1.713 1.675 1.637 1.601 1.565 1.53 1.496

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.417" PeakHeight="110.0" Num="3" Error="0.0">
-20.647 3.342 -0.249
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.417" EndFrequency="9.3" PeakHeight="491.181" Num="5" zHalfNm="398.723" Error="7.046">
-285.715 -18.893 13.978 -8.486 5.151
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.216" Depth="0.217"/>
<TopsideChapman PeakHeight="491.181" PeakDensity="1073076.9" PeakScaleHeight="68.462" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
