<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-10 -069 18:30:00.000"
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 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" >
2026.03.10 (069) 18:30:00</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">
FF202606903101830009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.407" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.160" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.650" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="566.637" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.936" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.142" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="388.564" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="280.036" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.512" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.650" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="142.269" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.623" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.624" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="189.670" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="6.850" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="98">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.000 363.750 367.500 371.250 375.000 376.786 378.571 380.357 382.143 383.929 385.714 387.500 389.286 391.071 392.857 394.643 396.429 398.214 400.000 400.000 405.000 406.667 408.333 410.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 430.000 430.000 430.000 430.000 435.000 435.000 445.000 445.000 445.000 445.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 470.000 472.500 475.000 475.000 480.000 480.000 480.000 485.000 487.500 490.000 490.000 492.500 495.000 495.000 500.000 500.000 505.000 505.000 510.000 510.000 512.500 515.000 517.500 520.000 522.500 525.000 525.000 528.750 532.500 536.250 540.000 545.000 545.000 545.000 550.000 555.000 557.464 560.193 563.232 566.637 570.479 574.846 579.855 585.660 592.464 600.552 610.323 622.366
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 60 0 0 0 57 0 48 0 0 0 0 0 0 0 0 0 51 0 48 51 0 0 0 48 51 54 48 51 48 51 51 45 0 54 0 51 0 48 54 51 48 0 51 54 54 45 48 51 48 51 0 51 54 45 51 51 0 0 48 54 45 51 54 48 51 48 51 45 54 0 57 0 54 0 60 57 0 0 0 54 45 54 0 48 0 48 0 48 45 45 45 0 42 0 48 51 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 2.734375 1.171875 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 1.953125 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 -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 -1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="67">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 120.000 120.000 120.000 120.000 115.000 115.417 115.833 116.250 116.667 117.083 117.500 117.917 118.333 118.750 119.167 119.583 120.000 110.000 120.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 111.667 113.333 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.625 111.250 111.875 112.500 113.125 113.750 114.375 115.000 115.000 110.000 111.667 113.333 115.000 115.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 60 48 0 51 48 0 0 0 54 0 0 0 0 0 0 0 45 45 48 60 54 54 60 51 0 0 51 63 63 54 0 60 60 0 66 69 63 0 0 66 0 0 0 0 0 0 72 72 69 63 0 0 0 0 0 0 0 66 63 0 0 0 60 60 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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 -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
</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" >
89.557 90.0 95.0 100.0 105.0 110.0 113.504 115.0 117.008 120.0 120.512 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 388.564 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.973 2.541 2.841 2.936 2.814 2.814 2.814 2.918 2.936 3.095 3.272 3.451 3.63 3.809 3.987 4.164 4.34 4.515 4.689 4.861 5.031 5.2 5.368 5.534 5.7 5.864 6.027 6.19 6.351 6.512 6.673 6.833 6.993 7.152 7.311 7.471 7.63 7.79 7.95 8.111 8.272 8.434 8.596 8.76 8.924 9.09 9.257 9.425 9.594 9.765 9.938 10.112 10.288 10.465 10.643 10.821 10.998 11.171 11.337 11.486 11.607 11.683 11.7 11.7 11.692 11.675 11.65 11.616 11.574 11.524 11.468 11.404 11.335 11.259 11.177 11.091 10.999 10.903 10.803 10.699 10.591 10.48 10.367 10.25 10.131 10.011 9.888 9.763 9.638 9.511 9.383 9.254 9.124 8.994 8.864 8.734 8.603 8.473 8.343 8.214 8.085 7.956 7.828 7.701 7.575 7.45 7.325 7.202 7.08 6.959 6.839 6.72 6.603 6.487 6.373 6.259 6.148 6.037 5.928 5.821 5.715 5.61 5.507 5.406 5.306 5.207 5.11 5.014 4.92 4.828 4.737 4.647 4.559 4.472 4.387 4.303 4.221 4.14 4.06 3.982 3.905 3.829 3.755 3.682 3.61 3.54 3.471 3.403 3.337 3.271 3.207 3.144 3.083 3.022 2.962 2.904 2.847 2.79 2.735 2.681 2.628 2.576 2.525 2.475 2.426 2.378 2.33 2.284 2.238 2.194 2.15 2.107 2.065 2.024 1.984 1.944 1.905 1.867 1.83 1.793 1.757 1.722 1.688 1.654 1.621 1.588

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.936" PeakHeight="110.0" Num="3" Error="0.0">
-30.141 12.623 -2.925
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.936" EndFrequency="11.7" PeakHeight="388.564" Num="5" zHalfNm="280.036" Error="1.763">
-225.175 -70.763 35.498 -8.559 0.947
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.512" Depth="0.122"/>
<TopsideChapman PeakHeight="388.564" PeakDensity="1698387.1" PeakScaleHeight="76.624" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
