<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-04 -035 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 44 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 50% PACIFIC flags: F2o cusp not found, One of F2 cusps was derived from the other, F2O model cusp does not fit trace</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" >
2026.02.04 (035) 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">
FF202603502042200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="24" >
<URSI ID="00" Val="7.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.611" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="18.279" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="8.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.500" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="7.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="525.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="0.417" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="421.153" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="371.829" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="74.460" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="10.064" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="36.890" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="88.220" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="95">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.3 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
370.000 375.000 375.000 375.769 376.538 377.308 378.077 378.846 379.615 380.385 381.154 381.923 382.692 383.462 384.231 385.000 390.000 390.000 391.250 392.500 393.750 395.000 396.250 397.500 398.750 400.000 395.000 400.000 405.000 405.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 410.000 411.000 412.000 413.000 414.000 415.000 420.000 421.667 423.333 425.000 426.667 428.333 430.000 431.667 433.333 435.000 435.000 436.250 437.500 438.750 440.000 445.000 447.500 450.000 450.000 450.000 450.000 450.000 452.143 454.286 456.429 458.571 460.714 462.857 465.000 467.353 469.706 472.059 474.412 476.765 479.118 481.471 483.824 486.176 488.529 490.882 493.235 495.588 497.941 500.294 502.647 505.000 510.000 515.000 515.000 518.333 521.667 525.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 66 0 0 69 0 0 0 0 0 0 0 51 0 0 60 0 0 0 0 0 60 0 0 60 0 63 54 60 0 0 0 51 0 57 48 63 0 66 0 0 0 0 0 0 0 0 0 0 0 0 48 48 0 51 0 0 54 0 57 0 0 60 0 0 0 0 0 0 0 54 0 0 0 0 0 0 0 0 0 0 0 0 0 51 0 0 45 54 57 54 48 0 51
</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 -1.171875 -0.390625 1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -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 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 1.953125 -0.390625 -2.734375 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 1.953125 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="166">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.446 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.076 140.0 145.0 150.0 155.0 160.0 165.0 168.153 170.0 175.0 180.0 185.0 190.0 195.0 197.229 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 421.153 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0
</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 0.465 0.543 0.616 0.69 0.764 0.84 0.918 0.999 1.083 1.169 1.26 1.353 1.451 1.552 1.657 1.767 1.881 1.999 2.121 2.249 2.381 2.519 2.662 2.81 2.964 3.124 3.29 3.462 3.641 3.827 4.019 4.22 4.427 4.643 4.866 5.097 5.336 5.581 5.831 6.083 6.332 6.567 6.773 6.926 6.997 7.0 6.993 6.963 6.911 6.841 6.754 6.651 6.536 6.41 6.275 6.132 5.983 5.829 5.672 5.512 5.351 5.189 5.027 4.866 4.707 4.549 4.394 4.241 4.091 3.945 3.802 3.662 3.526 3.394 3.266 3.142 3.022 2.905 2.792 2.683 2.578 2.476 2.378 2.284 2.193 2.105 2.02 1.939 1.861 1.786 1.713 1.644 1.577 1.513 1.451 1.392 1.335 1.28 1.228 1.177 1.129 1.083 1.038 0.995 0.954 0.915 0.877 0.841 0.806 0.773 0.741 0.711 0.681 0.653 0.626 0.6 0.575 0.552 0.529 0.507 0.486 0.466 0.446 0.428 0.41 0.393 0.377 0.361 0.346 0.332 0.318 0.305 0.292 0.28 0.269 0.258 0.247 0.237 0.227 0.217 0.208

</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="7.0" PeakHeight="421.153" Num="5" zHalfNm="371.829" Error="3.188">
-186.67 -59.619 24.551 -2.981 0.795
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.229" Depth="0.217"/>
<TopsideChapman PeakHeight="421.153" PeakDensity="607940.44" PeakScaleHeight="36.89" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
