<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 21:50:00.000"
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: 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" >
2026.03.14 (073) 21:50:00</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">
FF202607303142150009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.547" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.320" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.750" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="325.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="325.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="475.000" 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="0.423" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="413.608" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="337.345" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.937" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="110.783" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="27.278" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="57.194" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="107.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="117">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
325.000 326.429 327.857 329.286 330.714 332.143 333.571 335.000 335.000 336.667 338.333 340.000 340.000 340.000 340.000 341.250 342.500 343.750 345.000 345.000 346.250 347.500 348.750 350.000 350.000 350.000 352.500 355.000 355.000 355.000 350.000 355.000 355.000 356.667 358.333 360.000 360.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 365.000 370.000 370.000 371.667 373.333 375.000 375.000 375.000 375.000 375.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 400.000 405.000 405.000 407.500 410.000 412.500 415.000 415.000 420.000 420.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 460.000 465.000 470.000 470.000 475.000 475.000 485.000 490.000 490.000 495.000 500.000 505.000 510.000 520.000 525.000 535.000 540.000 549.667 560.690 573.378 588.138 605.522
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 60 0 54 66 0 0 60 0 63 66 0 0 0 60 63 0 0 0 57 0 63 0 54 0 60 0 66 0 0 0 63 0 69 0 0 0 69 69 0 0 69 69 0 0 69 69 0 0 0 54 0 63 66 69 63 66 66 69 66 72 75 66 69 72 72 66 72 0 69 0 63 69 57 66 69 63 69 63 72 60 66 54 63 69 66 57 66 60 66 63 69 66 63 66 66 66 66 63 63 63 63 60 63 63 60 63 57 60 60 0 54 48
</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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 2.734375 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125
</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" >
92.372 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 138.982 140.0 145.0 150.0 155.0 160.0 165.0 167.965 170.0 175.0 180.0 185.0 190.0 195.0 196.947 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 413.608 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.28 0.366 0.41 0.423 0.418 0.403 0.376 0.336 0.275 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.216 0.254 0.293 0.331 0.37 0.408 0.423 0.468 0.544 0.624 0.711 0.807 0.913 1.031 1.163 1.309 1.472 1.652 1.85 2.066 2.3 2.552 2.819 3.101 3.394 3.699 4.012 4.332 4.656 4.984 5.313 5.641 5.967 6.29 6.607 6.916 7.217 7.508 7.786 8.049 8.297 8.527 8.738 8.928 9.095 9.237 9.354 9.445 9.508 9.543 9.55 9.549 9.539 9.515 9.478 9.43 9.371 9.302 9.224 9.137 9.042 8.941 8.832 8.719 8.6 8.476 8.349 8.218 8.085 7.949 7.811 7.671 7.53 7.388 7.246 7.103 6.961 6.819 6.677 6.536 6.396 6.257 6.12 5.984 5.849 5.716 5.585 5.455 5.328 5.202 5.078 4.957 4.838 4.72 4.605 4.492 4.382 4.273 4.167 4.063 3.961 3.861 3.763 3.668 3.574 3.483 3.394 3.307 3.222 3.138 3.057 2.978 2.901 2.825 2.751 2.679 2.609 2.541 2.474 2.409 2.346 2.284 2.224 2.165 2.108 2.052 1.997 1.944 1.893 1.842 1.793 1.746 1.699 1.654 1.61 1.567 1.525 1.484 1.445 1.406 1.368 1.332 1.296 1.262 1.228 1.195 1.163 1.132 1.101 1.072 1.043 1.015 0.988 0.961 0.935 0.91 0.886 0.862 0.839 0.816 0.794 0.773 0.752 0.732 0.712 0.693 0.675 0.656 0.639

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.423" PeakHeight="110.0" Num="3" Error="0.0">
-20.79 3.422 -0.26
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.423" EndFrequency="9.55" PeakHeight="413.608" Num="5" zHalfNm="337.345" Error="2.719">
-221.814 6.617 -1.698 -0.864 1.098
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="86.947" Depth="0.223"/>
<TopsideChapman PeakHeight="413.608" PeakDensity="1131544.6" PeakScaleHeight="57.194" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
