<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 14:30:00.000"
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 1 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" >
2026.03.10 (069) 14:30:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606903101430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.025" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="6.122" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.776" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.536" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="285.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.700" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="457.437" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.394" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.362" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="322.494" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="208.480" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.769" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.942" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="81.247" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="74.032" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.227" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="56.566" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="133.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.160" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.300" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 340.000 340.000 340.000 337.500 335.000 335.000 330.000 325.000 325.000 327.500 330.000 330.000 330.000 325.000 320.000 321.667 323.333 325.000 325.000 325.000 325.000 330.000 330.000 330.000 335.000 335.000 337.000 339.000 341.000 343.000 345.000 347.500 350.000 350.000 355.000 355.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 373.333 376.667 380.000 380.000 385.000 390.000 391.667 393.333 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 410.000 410.000 412.500 415.000 420.000 420.000 420.000 420.000 420.000 422.500 425.000 425.000 427.000 429.000 431.000 433.000 435.000 437.500 440.000 440.000 440.000 440.000 440.000 440.000 445.000 450.000 452.500 455.000 457.437 460.365 463.952 468.448 474.246 482.010 492.942
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 51 51 54 54 0 48 51 51 60 45 0 51 45 45 63 60 0 0 60 60 57 63 63 60 66 63 66 0 57 0 0 57 54 60 57 60 63 66 69 63 60 51 0 54 0 0 54 60 45 60 0 0 63 57 63 66 63 63 60 63 60 60 0 57 63 63 63 57 51 0 57 51 0 0 45 0 48 0 54 0 0 54 54 0 0 54 0 48 54 45 0 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 0.390625 -0.390625 -0.390625 0.390625 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 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 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 -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 -1.953125 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 0.390625 -1.171875 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="15">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
285.000 285.000 290.000 295.000 300.000 305.000 310.000 315.000 320.000 325.000 330.000 332.000 334.000 336.000 338.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 51 0 0 0 0 48 0 0 51 48 0 51 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 -1.953125 0.390625 0.390625 -0.390625 -1.171875 -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="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.483 90.0 95.0 100.0 105.0 110.0 111.535 113.071 114.606 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 208.48 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.494 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.283 2.937 3.283 3.394 3.271 3.271 3.394 3.41 3.61 3.808 4.004 4.193 4.373 4.541 4.698 4.844 4.982 5.113 5.238 5.359 5.477 5.594 5.71 5.829 5.95 6.072 6.122 6.172 6.363 6.601 6.879 7.171 7.45 7.709 7.949 8.173 8.387 8.593 8.794 8.992 9.189 9.387 9.587 9.792 10.001 10.218 10.44 10.663 10.868 11.005 11.025 11.023 11.007 10.975 10.929 10.869 10.797 10.713 10.618 10.514 10.401 10.28 10.151 10.016 9.876 9.73 9.58 9.426 9.268 9.108 8.946 8.783 8.618 8.452 8.286 8.119 7.953 7.787 7.622 7.458 7.296 7.134 6.975 6.817 6.661 6.507 6.355 6.205 6.058 5.912 5.77 5.63 5.492 5.357 5.224 5.094 4.967 4.842 4.72 4.6 4.483 4.369 4.257 4.147 4.04 3.936 3.834 3.734 3.636 3.541 3.448 3.358 3.269 3.183 3.099 3.017 2.937 2.859 2.783 2.709 2.637 2.567 2.498 2.431 2.366 2.303 2.241 2.181 2.122 2.065 2.01 1.956 1.903 1.852 1.802 1.753 1.706 1.66 1.615 1.571 1.529 1.487 1.447 1.408 1.37 1.333 1.296 1.261 1.227 1.194 1.161 1.13 1.099 1.069 1.04 1.012 0.985 0.958 0.932 0.906 0.882 0.858 0.835 0.812 0.79 0.768 0.747 0.727 0.707 0.688 0.669 0.651 0.633 0.616 0.599 0.583 0.567 0.552 0.537 0.522 0.508 0.494 0.481 0.468 0.455 0.442 0.43

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.394" PeakHeight="110.0" Num="3" Error="0.0">
-30.503 13.155 -3.169
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.394" EndFrequency="6.122" PeakHeight="208.48" Num="5" Error="0.0">
-75.254 -29.217 14.631 -4.897 0.863
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="6.122" EndFrequency="11.025" PeakHeight="322.494" Num="5" zHalfNm="241.769" Error="3.126">
-88.73 -33.083 10.904 -1.585 -1.52
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.606" Depth="0.123"/>
<TopsideChapman PeakHeight="322.494" PeakDensity="1508072.2" PeakScaleHeight="56.566" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
