<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-12 -071 13:30:00.000"
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" >
2026.03.12 (071) 13:30:00</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">
FF202607103121330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.471" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.967" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="421.667" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.308" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.322" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="386.788" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="237.211" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.466" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="199.480" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="54.138" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="109.532" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="221.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.800" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 305.000 305.000 307.727 310.455 313.182 315.909 318.636 321.364 324.091 326.818 329.545 332.273 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 345.000 346.250 347.500 348.750 350.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 365.000 365.000 365.000 370.000 372.500 375.000 375.000 375.000 375.000 380.000 382.500 385.000 390.000 395.000 395.000 400.000 400.000 405.000 410.000 410.000 415.000 418.333 421.667 425.000 430.000 435.000 445.000 450.000 455.000 460.000 465.000 470.000 475.000 482.500 490.000 495.000 505.000 510.000 515.000 520.000 525.000 530.000 540.000 550.000 560.000 565.000 580.000 585.000 605.000 615.000 630.000 645.000 663.062 683.299 706.131 732.089 761.864
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 45 0 0 48 0 0 0 48 0 0 0 54 0 54 54 57 0 51 60 54 57 0 0 0 60 54 0 54 60 54 57 63 51 60 63 54 0 51 57 60 63 63 0 63 57 51 63 66 60 60 60 60 63 0 0 63 66 72 66 60 66 57 54 54 48 0 51 45 51 48 57 54 57 60 60 63 60 57 51 57 57 57 54 51 48 0 0 45 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 0.390625 0.390625 1.953125 -0.390625 -0.390625 2.734375 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 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 1.953125 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" >
89.496 90.0 95.0 100.0 105.0 110.0 111.888 113.776 115.0 115.664 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 386.788 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.225 2.863 3.2 3.308 3.185 3.185 3.265 3.308 3.44 3.576 3.704 3.83 3.954 4.079 4.206 4.335 4.468 4.605 4.745 4.89 5.039 5.192 5.348 5.508 5.669 5.832 5.995 6.158 6.32 6.479 6.637 6.791 6.943 7.092 7.237 7.379 7.518 7.653 7.785 7.914 8.04 8.162 8.282 8.398 8.511 8.621 8.728 8.831 8.93 9.026 9.118 9.205 9.287 9.363 9.433 9.497 9.553 9.602 9.641 9.671 9.69 9.699 9.7 9.699 9.695 9.687 9.675 9.659 9.641 9.619 9.593 9.565 9.534 9.5 9.463 9.423 9.381 9.337 9.29 9.242 9.191 9.138 9.083 9.027 8.969 8.909 8.848 8.785 8.721 8.656 8.59 8.522 8.454 8.385 8.315 8.244 8.172 8.1 8.027 7.954 7.88 7.806 7.731 7.656 7.581 7.506 7.431 7.355 7.279 7.204 7.128 7.053 6.977 6.902 6.827 6.752 6.677 6.603 6.528 6.454 6.381 6.308 6.235 6.162 6.09 6.018 5.947 5.876 5.806 5.736 5.667 5.598 5.53 5.462 5.394 5.328 5.262 5.196 5.131 5.067 5.003 4.939 4.877 4.815 4.753 4.692 4.632 4.572 4.513 4.455 4.397 4.339 4.283 4.227 4.171 4.116 4.062 4.009 3.956 3.903 3.851 3.8 3.749 3.699 3.65 3.601 3.553 3.505 3.458 3.411 3.365 3.319 3.274 3.23 3.186 3.143 3.1 3.058 3.016 2.975 2.934 2.894 2.855 2.815 2.777 2.739

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.308" PeakHeight="110.0" Num="3" Error="0.0">
-30.441 13.063 -3.126
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.308" EndFrequency="9.7" PeakHeight="386.788" Num="5" zHalfNm="237.211" Error="7.548">
-258.35 -19.044 9.21 -6.138 3.198
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.664" Depth="0.123"/>
<TopsideChapman PeakHeight="386.788" PeakDensity="1167369.8" PeakScaleHeight="109.532" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
