<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 14:50:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.29 (088) 14:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608803291450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="12.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.555" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.578" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.700" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.700" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="295.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="295.000" 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="12.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="500.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.401" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.700" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.700" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.365" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="368.217" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="275.454" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.118" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.890" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="61.833" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="69.141" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="168.700" 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="142">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
295.000 295.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 316.667 318.333 320.000 325.000 325.000 327.222 329.444 331.667 333.889 336.111 338.333 340.556 342.778 345.000 345.000 347.500 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 410.000 415.000 415.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 420.000 420.000 421.667 423.333 425.000 425.000 430.000 431.667 433.333 435.000 430.000 435.000 436.667 438.333 440.000 441.667 443.333 445.000 445.000 442.500 440.000 450.000 450.000 450.000 450.000 450.000 450.000 452.500 455.000 457.500 460.000 460.000 465.000 465.000 470.000 472.500 475.000 475.000 480.000 483.750 487.500 491.250 495.000 495.000 495.000 500.000 500.000 505.000 510.000 513.725 517.882 522.550 527.831 533.853 540.784 548.847 558.344 569.695 583.500 600.653
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 48 48 45 51 54 54 57 51 54 0 51 0 0 48 54 51 0 0 0 51 0 0 0 0 57 57 0 0 0 57 60 57 54 57 60 60 63 66 66 63 72 72 69 66 66 69 72 72 72 72 66 66 66 0 69 69 66 66 63 66 72 69 69 69 72 66 45 66 69 60 0 66 66 66 63 63 63 66 60 60 63 48 0 0 57 57 57 0 0 48 54 57 0 0 51 0 0 45 48 0 42 48 51 54 51 48 48 0 0 0 54 0 51 51 54 0 51 54 51 0 0 0 42 51 51 51 48 51 51 0 51 51 51 42 48 48 48 48 45 42
</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 -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 -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 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 -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 -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 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="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.481 90.0 95.0 100.0 105.0 110.0 111.507 113.014 114.521 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.217 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.288 2.943 3.29 3.401 3.278 3.278 3.401 3.421 3.622 3.804 3.977 4.143 4.305 4.463 4.62 4.775 4.93 5.084 5.239 5.395 5.552 5.709 5.869 6.03 6.193 6.358 6.525 6.695 6.868 7.044 7.222 7.404 7.59 7.779 7.971 8.168 8.368 8.573 8.782 8.996 9.214 9.437 9.664 9.895 10.131 10.37 10.612 10.856 11.102 11.346 11.586 11.819 12.041 12.245 12.425 12.573 12.68 12.739 12.75 12.749 12.738 12.715 12.68 12.635 12.579 12.513 12.438 12.354 12.262 12.163 12.057 11.944 11.826 11.702 11.574 11.441 11.304 11.163 11.019 10.873 10.724 10.573 10.42 10.266 10.11 9.954 9.797 9.64 9.483 9.325 9.168 9.011 8.855 8.7 8.545 8.392 8.239 8.088 7.938 7.79 7.643 7.498 7.354 7.212 7.072 6.934 6.797 6.663 6.53 6.399 6.271 6.144 6.019 5.896 5.775 5.656 5.54 5.425 5.312 5.201 5.092 4.985 4.88 4.777 4.676 4.577 4.48 4.384 4.291 4.199 4.109 4.02 3.934 3.849 3.766 3.684 3.605 3.526 3.45 3.375 3.301 3.229 3.159 3.09 3.022 2.956 2.891 2.828 2.766 2.705 2.646 2.588 2.531 2.475 2.42 2.367 2.315 2.264 2.214 2.165 2.117 2.07 2.024 1.979 1.935 1.893 1.851 1.81 1.769 1.73 1.692 1.654 1.617 1.581 1.546 1.512 1.478 1.445 1.413 1.382 1.351 1.321 1.292 1.263 1.235 1.207

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.401" PeakHeight="110.0" Num="3" Error="0.0">
-30.508 13.162 -3.173
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.401" EndFrequency="12.75" PeakHeight="368.217" Num="5" zHalfNm="275.454" Error="2.529">
-205.472 -65.557 15.695 1.733 -0.095
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.521" Depth="0.123"/>
<TopsideChapman PeakHeight="368.217" PeakDensity="2016904.5" PeakScaleHeight="69.141" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
