<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2025-12-29 -363 21:20:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2025.12.29 (363) 21:20:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.09" 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">
FF202536312292120009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.568" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.529" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.350" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" 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="0.829" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="405.999" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="343.104" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.425" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="92.340" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="22.719" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="45.100" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="105.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.330" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="145">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 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 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" >
315.000 316.000 317.000 318.000 319.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 336.667 338.333 340.000 341.667 343.333 345.000 346.667 348.333 350.000 350.000 350.625 351.250 351.875 352.500 353.125 353.750 354.375 355.000 358.333 361.667 365.000 365.000 365.000 365.000 365.000 375.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 382.000 384.000 386.000 388.000 390.000 390.000 395.000 396.250 397.500 398.750 400.000 400.000 402.500 405.000 410.000 411.667 413.333 415.000 416.667 418.333 420.000 420.000 420.000 420.000 425.000 425.000 428.333 431.667 435.000 435.000 440.000 440.000 440.000 440.000 440.000 442.500 445.000 447.500 450.000 455.000 455.000 460.000 460.000 465.000 465.000 465.000 465.000 465.000 470.000 475.000 475.000 475.000 475.000 475.000 480.000 480.000 482.500 485.000 485.000 490.000 490.000 490.000 495.000 495.000 497.500 500.000 500.000 505.000 505.000 510.000 510.000 515.000 520.000 520.000 520.000 525.000 530.000 530.000 535.000 542.445
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 60 0 0 0 69 72 66 69 69 69 0 0 66 72 0 69 69 63 72 69 69 66 69 0 57 57 60 0 0 0 0 0 0 0 0 0 75 0 0 66 0 0 0 0 69 0 0 0 0 63 0 0 54 0 57 0 0 0 57 63 0 0 0 0 57 60 60 0 0 0 57 60 0 60 54 0 0 0 0 0 54 60 48 60 63 63 0 0 54 57 48 0 0 66 66 0 0 0 63 57 63 54 60 48 57 0 66 66 66 51 0 63 69 69 63 66 0 57 63 51 0 60 57 60 0 60 60 63 63 66 69 66 57 66 66 66 60 66 66 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -0.390625 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.171875 -1.953125 -1.953125 2.734375 -1.953125 -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 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -1.953125 -1.953125 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375 -2.734375
</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" >
90.498 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 132.218 135.0 140.0 145.0 150.0 154.435 155.0 160.0 165.0 170.0 175.0 176.653 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 405.999 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.551 0.718 0.803 0.829 0.816 0.775 0.702 0.585 0.51 0.51 0.51 0.51 0.51 0.51 0.518 0.59 0.662 0.733 0.805 0.829 0.904 0.998 1.087 1.175 1.266 1.36 1.461 1.569 1.684 1.809 1.945 2.091 2.25 2.42 2.602 2.794 2.995 3.204 3.419 3.638 3.861 4.085 4.311 4.538 4.765 4.992 5.221 5.449 5.678 5.909 6.14 6.372 6.607 6.843 7.081 7.322 7.566 7.812 8.062 8.314 8.567 8.819 9.063 9.286 9.462 9.547 9.55 9.543 9.514 9.466 9.399 9.316 9.217 9.105 8.981 8.846 8.701 8.549 8.39 8.224 8.055 7.881 7.705 7.526 7.346 7.166 6.985 6.805 6.625 6.447 6.271 6.096 5.924 5.754 5.588 5.424 5.263 5.105 4.951 4.8 4.653 4.509 4.368 4.231 4.098 3.968 3.842 3.719 3.599 3.483 3.37 3.261 3.155 3.051 2.951 2.854 2.76 2.669 2.581 2.495 2.412 2.332 2.254 2.179 2.106 2.036 1.968 1.902 1.838 1.776 1.716 1.658 1.603 1.549 1.496 1.446 1.397 1.35 1.304 1.26 1.217 1.176 1.136 1.098 1.061 1.025 0.99 0.956 0.924 0.893 0.862 0.833 0.805 0.777 0.751 0.725 0.701 0.677 0.654 0.632 0.61 0.589 0.569 0.55 0.531 0.513 0.496 0.479 0.463 0.447 0.432 0.417 0.403 0.389 0.376 0.363 0.351 0.339 0.327 0.316 0.305 0.295 0.285 0.275 0.266 0.257

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.829" PeakHeight="110.0" Num="3" Error="0.0">
-25.599 7.069 -0.972
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.829" EndFrequency="9.55" PeakHeight="405.999" Num="5" zHalfNm="343.104" Error="4.897">
-192.803 -54.543 25.376 -12.719 5.343
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="66.653" Depth="0.319"/>
<TopsideChapman PeakHeight="405.999" PeakDensity="1131544.6" PeakScaleHeight="45.1" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
