<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-17 -076 11:20:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp</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" >
2026.03.17 (076) 11:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607603171120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.999" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.942" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.600" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.500" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.610" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="111.848" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="100.250" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="10.056" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="391.438" 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="2.811" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.500" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.500" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="300.406" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.501" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.120" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.950" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="88.132" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="30.407" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="48.822" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.430" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="3.500" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="144">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 215.000 215.000 220.000 220.000 220.000 215.000 220.000 225.000 225.000 225.000 228.333 231.667 235.000 235.000 235.000 237.500 250.000 250.000 255.000 255.000 260.000 260.000 260.000 260.000 265.000 265.000 270.000 270.000 270.000 270.000 270.000 275.000 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 286.667 288.333 290.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 305.000 305.000 307.500 310.000 305.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 317.500 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 330.000 330.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 357.500 360.000 365.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 375.000 375.000 376.657 378.484 380.511 382.771 385.307 388.173 391.438 395.192 399.552 404.680 410.796 418.218 427.414 439.105 454.468 475.553
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 45 54 57 0 48 60 0 51 45 48 0 0 57 60 66 0 51 63 51 60 54 60 54 57 63 66 60 0 69 0 63 0 66 69 69 63 63 66 63 57 63 66 63 63 69 66 69 69 69 69 69 0 0 60 63 66 66 63 0 66 72 72 0 63 66 63 0 63 63 63 63 66 0 60 66 66 0 0 72 63 0 72 0 57 63 72 75 81 75 75 75 60 60 63 72 54 63 66 54 57 63 66 66 51 57 66 51 57 63 63 51 69 66 63 63 54 60 48 54 63 63 51 54 63 63 60 60 60 60 60 63 60 60 57 54 51 45 42 0 45 0 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 -2.734375 -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 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 2.734375 -1.953125 0.390625 0.390625 2.734375 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
111.848 112.820 113.949 115.302
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 115.000 117.500 120.000 120.000 122.500 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 60 0 57 57 0 54 54 45 45 0 0 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
</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" >
90.0 95.0 100.0 100.25 104.332 105.0 108.413 110.0 112.495 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 300.406 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.226 2.609 2.61 2.496 2.496 2.496 2.54 2.61 2.684 2.828 2.97 3.111 3.254 3.4 3.549 3.703 3.862 4.027 4.199 4.377 4.563 4.757 4.96 5.172 5.394 5.625 5.865 6.116 6.376 6.645 6.923 7.208 7.501 7.799 8.102 8.408 8.714 9.018 9.316 9.603 9.874 10.121 10.333 10.5 10.608 10.65 10.65 10.641 10.612 10.563 10.497 10.414 10.317 10.207 10.084 9.95 9.807 9.656 9.497 9.332 9.161 8.986 8.808 8.626 8.443 8.258 8.072 7.885 7.699 7.514 7.329 7.146 6.965 6.785 6.608 6.433 6.261 6.092 5.925 5.762 5.601 5.444 5.29 5.139 4.992 4.848 4.707 4.57 4.436 4.306 4.178 4.054 3.933 3.816 3.701 3.59 3.482 3.376 3.274 3.174 3.077 2.983 2.892 2.803 2.717 2.634 2.553 2.474 2.397 2.323 2.251 2.182 2.114 2.048 1.985 1.923 1.863 1.805 1.749 1.694 1.641 1.59 1.54 1.492 1.445 1.4 1.356 1.314 1.273 1.233 1.194 1.157 1.12 1.085 1.051 1.018 0.986 0.955 0.925 0.896 0.868 0.841 0.814 0.789 0.764 0.74 0.717 0.694 0.672 0.651 0.631 0.611 0.592 0.573 0.555 0.538 0.521 0.504 0.488 0.473 0.458 0.444 0.43 0.416 0.403 0.39 0.378 0.366 0.355 0.344 0.333 0.322 0.312 0.302 0.293 0.284 0.275 0.266 0.258 0.249 0.242 0.234 0.227 0.219 0.213 0.206

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.61" PeakHeight="100.25" Num="3" Error="4.325">
-15.0 6.122 -1.372
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.61" EndFrequency="10.65" PeakHeight="300.406" Num="5" zHalfNm="235.501" Error="2.773">
-149.825 -42.761 3.976 -0.194 0.893
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="12.245" Depth="0.114"/>
<TopsideChapman PeakHeight="300.406" PeakDensity="1407227.0" PeakScaleHeight="48.822" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
