<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-01-29 -029 22:40:00.000"
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 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" >
2026.01.29 (029) 22:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.12" 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">
FF202602901292240009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.600" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.715" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.067" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="485.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="397.198" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="351.384" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.545" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="68.625" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="17.067" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="34.159" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="74.910" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.450" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="152">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 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 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 9.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 325.000 325.000 325.000 325.500 326.000 326.500 327.000 327.500 328.000 328.500 329.000 329.500 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.714 341.429 342.143 342.857 343.571 344.286 345.000 345.000 345.000 346.250 347.500 348.750 350.000 345.000 350.000 350.000 350.000 350.000 350.000 351.000 352.000 353.000 354.000 355.000 355.000 356.667 358.333 360.000 360.000 360.000 360.000 355.000 356.364 357.727 359.091 360.455 361.818 363.182 364.545 365.909 367.273 368.636 370.000 367.500 365.000 365.000 370.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 385.000 387.500 390.000 390.000 390.000 390.000 391.667 393.333 395.000 395.000 396.667 398.333 400.000 400.000 400.000 400.000 402.500 405.000 405.000 405.000 405.000 406.667 408.333 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 445.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 470.000 470.000 475.000 480.000 480.000 485.000 485.000 489.696 495.531
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 63 0 63 0 0 60 0 0 66 0 0 0 63 63 63 0 0 66 0 66 57 0 0 0 0 0 0 57 60 63 0 0 0 51 66 54 0 0 57 57 0 0 0 0 63 63 0 0 51 57 0 57 0 0 0 0 54 0 57 0 0 0 0 57 0 63 0 0 57 60 60 0 0 51 57 0 60 63 0 63 54 0 60 0 51 51 0 63 0 0 60 54 48 0 60 63 69 78 0 69 69 72 72 0 0 66 66 66 60 63 66 54 60 63 63 57 63 66 66 60 63 54 57 63 63 57 60 60 57 60 60 60 60 63 54 60 60 60 51 57 60 54 60 57 60 57 60 60 63 63 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625 -2.734375 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 -2.734375 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 2.734375 -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 0.390625 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 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 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="162">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 142.327 145.0 150.0 155.0 160.0 165.0 170.0 174.653 175.0 180.0 185.0 190.0 195.0 200.0 205.0 206.98 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 397.198 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.342 0.327 0.304 0.273 0.227 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.202 0.225 0.249 0.273 0.297 0.321 0.345 0.354 0.417 0.502 0.586 0.672 0.763 0.863 0.971 1.088 1.218 1.359 1.514 1.682 1.865 2.063 2.275 2.503 2.745 3.002 3.273 3.558 3.857 4.168 4.492 4.829 5.178 5.538 5.909 6.29 6.679 7.075 7.475 7.873 8.264 8.638 8.979 9.267 9.479 9.588 9.6 9.594 9.553 9.479 9.374 9.242 9.086 8.911 8.72 8.514 8.297 8.072 7.841 7.605 7.366 7.126 6.887 6.648 6.412 6.18 5.951 5.726 5.507 5.293 5.084 4.882 4.685 4.494 4.31 4.132 3.96 3.794 3.634 3.48 3.332 3.189 3.052 2.921 2.794 2.673 2.557 2.445 2.339 2.236 2.138 2.044 1.954 1.868 1.786 1.707 1.631 1.559 1.49 1.424 1.361 1.3 1.243 1.187 1.135 1.084 1.036 0.99 0.946 0.903 0.863 0.825 0.788 0.753 0.719 0.687 0.656 0.627 0.599 0.572 0.547 0.522 0.499 0.477 0.455 0.435 0.416 0.397 0.379 0.362 0.346 0.331 0.316 0.302 0.288 0.275 0.263 0.251 0.24 0.229 0.219 0.209 0.2

</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="9.6" PeakHeight="397.198" Num="5" zHalfNm="351.384" Error="3.91">
-168.687 -34.254 14.116 -3.507 2.114
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="96.98" Depth="0.154"/>
<TopsideChapman PeakHeight="397.198" PeakDensity="1143424.4" PeakScaleHeight="34.159" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
