<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 17:50:00.000"
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 33 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 65% 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" >
2026.03.11 (070) 17:50:00</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">
FF202607003111750009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.416" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.432" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="7.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.800" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="445.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.113" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.800" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.800" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.229" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="375.138" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="242.336" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.349" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="171.464" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.082" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="93.689" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="209.460" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.430" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.800" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="79">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
310.000 315.000 315.000 320.000 320.000 325.000 325.000 326.667 328.333 330.000 335.000 340.000 340.000 345.000 348.333 351.667 355.000 355.000 356.667 358.333 360.000 365.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 415.000 415.000 425.000 425.000 430.000 430.000 435.000 440.000 445.000 445.000 455.000 460.000 465.000 470.000 470.000 475.000 480.000 485.000 490.000 500.000 505.000 515.000 520.000 520.000 525.000 530.000 535.000 540.000 545.000 555.000 560.000 565.000 571.261 578.115 585.650 593.973 603.215 613.535 625.136 638.271 653.267 670.547
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 57 60 57 57 57 0 0 60 60 57 60 60 0 0 63 57 0 0 66 66 66 60 66 0 54 66 57 66 63 60 69 63 69 66 60 66 66 60 66 66 63 66 66 63 66 63 63 63 60 60 57 57 57 60 57 60 51 48 60 60 57 57 57 54 60 60 57 57 54 57 54 54 51 51 48 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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>
<Trace Type="standard" Layer="Es" Polarization="O" Num="81">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 110.000 115.000 113.333 111.667 110.000 115.000 113.750 112.500 111.250 110.000 110.000 110.000 110.000 110.000 110.000 110.000 107.500 105.000 115.000 111.667 108.333 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 110.000 110.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 110.000 110.000 105.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 45 0 0 48 45 0 0 0 63 0 0 0 0 0 0 48 0 48 0 0 57 57 0 60 0 66 66 66 63 66 48 45 0 0 0 0 0 51 0 0 0 0 0 57 45 51 54 48 0 48 48 54 54 51 51 45 45 51 54 54 57 54 60 54 0 54 51 57 54 0 51 51 51 57 54 54 51 0 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 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 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 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 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
</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" >
89.527 90.0 95.0 100.0 105.0 110.0 112.72 115.0 115.44 118.16 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.138 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.093 2.694 3.012 3.113 2.991 2.991 2.991 3.113 3.18 3.34 3.485 3.625 3.762 3.9 4.04 4.181 4.326 4.474 4.626 4.78 4.937 5.096 5.256 5.416 5.576 5.736 5.894 6.049 6.203 6.354 6.503 6.649 6.793 6.934 7.072 7.208 7.342 7.474 7.604 7.732 7.858 7.983 8.106 8.228 8.348 8.467 8.584 8.7 8.814 8.926 9.036 9.143 9.247 9.346 9.439 9.522 9.594 9.651 9.687 9.7 9.7 9.697 9.69 9.677 9.659 9.637 9.61 9.579 9.544 9.505 9.462 9.416 9.366 9.313 9.257 9.198 9.136 9.072 9.006 8.937 8.866 8.793 8.718 8.642 8.564 8.485 8.404 8.322 8.239 8.156 8.071 7.986 7.899 7.813 7.726 7.638 7.55 7.462 7.374 7.286 7.197 7.109 7.02 6.932 6.844 6.757 6.669 6.582 6.496 6.409 6.324 6.238 6.154 6.069 5.986 5.903 5.82 5.739 5.657 5.577 5.497 5.419 5.34 5.263 5.186 5.11 5.035 4.961 4.888 4.815 4.743 4.672 4.602 4.533 4.464 4.396 4.329 4.263 4.198 4.134 4.07 4.007 3.945 3.884 3.824 3.765 3.706 3.648 3.591 3.535 3.479 3.424 3.37 3.317 3.265 3.213 3.162 3.112 3.062 3.013 2.965 2.918 2.871 2.825 2.78 2.736 2.692 2.648 2.606 2.564 2.523 2.482 2.442 2.402 2.364 2.325 2.288 2.251 2.214 2.178 2.143 2.108 2.074 2.04 2.007 1.974

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.113" PeakHeight="110.0" Num="3" Error="0.0">
-30.288 12.839 -3.024
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.113" EndFrequency="9.7" PeakHeight="375.138" Num="5" zHalfNm="242.336" Error="5.357">
-230.76 -43.625 24.208 -10.496 3.695
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.16" Depth="0.122"/>
<TopsideChapman PeakHeight="375.138" PeakDensity="1167369.8" PeakScaleHeight="93.689" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
